Understanding Motion Detection

Note: Before you Enable Motion Detection on your camera, you must first arm your Blink system. Once you arm your Blink system and Enable Motion Detection, you will then receive motion notifications on your mobile device. This article describes how to manage the Motion Detection feature for your Blink camera.  

How Blink cameras detect motion

Blink cameras use either Passive Infrared (PIR) or Pixel Difference Analysis (PDA) to detect motion. Both technologies provide similar motion detection. Blink cameras detect motion best from about 7 to 19 feet (2m to 6m) away, and can respond to motion at 30 feet (10m). Other factors affect what motion is detected like camera placement, object size, and temperature. 

Motion Detection using Passive Infrared (PIR) sensors

Blink Mini 2, Outdoor 4, Wired Floodlight, Outdoor and Indoor (3rd Gen), Blink Indoor (1st Gen), XT2, XT
The Passive Infrared (PIR) sensor detects heat energy from anything in the view. To detect movement, a special lens exaggerates activity across the sensor. PIR can be sensitive to groups of motion, like sunlight and shadows through a tree, blowing leaves, or rain.

PIR is most sensitive to motion moving across the field of view. Objects that are the same apparent temperature as the background may not be detected when they move. PIR sensors also work well with the Night Vision IR light in Blink cameras.

Motion Detection using Pixel Difference Analysis

Blink Mini
Pixel Difference Analysis (PDA) compares every frame of video to the next one, looking for a certain amount of difference. The amount of change needed to make a Motion Detection event is controlled with the Sensitivity setting in the Blink app. Low sensitivity means it is harder to make a motion detection event. High sensitivity responds to small amounts of motion.

Mini cameras have been used to detect motion through glass. This is not the most accurate way to detect motion, however, you can take the following precautions. 

  • Make sure the area being watched is well lit.
  • Put the face of the Mini as close to the window as possible. Some people have even used gaffer's tape to seal the Mini against the window.
  • Turn off the Recording LED and the Night Vision IR LED to prevent glare from reflected light.

Note: The Mini camera was not designed to detect motion through glass and your results may not be consistent.


Motion Settings 

Motion Settings allow you to customize how your Blink camera detects motion. This setting is accessible by tapping the More  button located at the bottom-right corner of the device thumbnail to access Device Settings. You can then control motion detection, zones, retrigger time, and more. Visit the New Device Layout Settings article for a complete list of motion settings for your Blink camera. Note: Before you Enable Motion Detection on your camera, you must first arm your Blink system.

Arming and Disarming your Blink system

Use this article to understand how to arm or disarm your system for motion detection. 

Overview of Arming and Disarming your system

The following table refers to how a single camera works when you Arm or Disarm your system.

System status Motion Detection is: Use Live View Send Motion Notifications Record motion events* Save Live View*
Armed ON Yes Yes Yes Yes
Armed OFF


Disarmed ON



Disarmed OFF



*You must have a storage location established on your account in order to save clips. Learn more at Blink storage options for motion clips.Delete


When you first set up your Blink system, your system is Disarmed by default. If you want to receive motion notification for motion events, you must first arm your Blink system in the Blink app. Once your system is Armed, any motion detected by your cameras will send a notification to your mobile device.

If you have a Blink Subscription Plan or trial or you are using Local Storage with a Sync Module 2 and USB drive, motion events are recorded as motion clips. If you are not subscribing to a Blink Subscription Plan or do not have local storage, no motion clips are saved.

You can arm your Blink system by tapping Armed at the bottom of the Home screen (as shown below). A message will display confirming that your system has been Armed.


If your system is Disarmed, your camera will not send you motion notifications for motion events or record motion clips.

If you want to disarm your Blink system or cameras, tap the Disarmed button. It will turn blue indicating that your system is disarmed.


If you want to receive notifications for motion events, you must first arm your Blink system. Once your system is Armed, the Motion Detection icon  displays in the corner of your camera's thumbnail on the Home screen.

When Motion Detection is on, any significant movement detected by your camera(s) will send a notification to your mobile device. If Motion Detection is off, that camera will not send any notifications.

Learn more about understanding Motion Detection.


Enable Motion Detection

Use this article to understand how to turn Motion Detection On or Off.

By default, Motion Detection is On for every camera on your system.

When Motion Detection is On for a camera:

  • The Motion Detection icon (Running Man) appears on the Home screen next to More   for each of your camera's thumbnails.
  • You will receive motion notifications for motion events on your mobile device once you have Armed your system. 
  • If you have a Blink Subscription Plan or trial or are using Local Storage with a Sync Module 2 and USB drive,` motion events are recorded as motion clips. If you are not subscribing to a Blink Subscription Plan or do not have local storage, no motion clips are saved. Learn more at Blink storage options for motion clips.

When Motion Detection is Off for a camera:

  • The Motion Detection icon (Running Man) changes to .
  • You will not receive motion notifications on your mobile device.
  • Motion clips will not be recorded and saved into your storage location.

How to activate it

In the lower right of the camera's thumbnail, tap More, and then tap Motion Detection .This turns the  Motion Detection setting On or Off.

  • A message displays at the top of your camera's thumbnail confirming Motion Detection has been turned On or Off.
  • means Motion Detection is On, and the camera is actively watching for motion.
  • means Motion Detection is Off for that camera.

Note: The Motion Detection setting can also be accessed by tapping More > Device Settings.

Turning off Motion Detection

If you have have a Blink Subscription Plan or trial, and you want a specific camera in your system to record motion clips, turning off Motion Detection may be a solution.

For example, you want notifications for a visitor arriving at your "Front door" camera, but you don't want to be notified of motion events seen by your indoor "Living Room" camera. In this scenario, Motion Detection is On for the "Front door," and Off for the "Living Room."

  • When the system is Armed, all motion seen by "Front door" creates a notification, but all motion seen by "Living Room" will not.
  • When the system is Armed, video clips are recorded for "Front door" events, but no motion clips are recorded from the "Living Room."
  • When the system is Disarmed, no notifications are sent and clips will not be recorded by either camera.


Alternatively, if you want to temporarily disable Motion Detection, you can use Snooze. Learn more about How to Snooze Motion Notifications.

Settings memory

Each time your system is Armed, your settings will stay the same. Cameras that have Motion Detection On or Off remain that way until you change them.

Turning Motion Detection On or Off within Device Settings

You can also turn Motion Detection On or Off through your camera's Device Settings.

Note: This setting functions the same as turning Motion Detection on or off through More.

  1. From your camera's thumbnail, tap  More  here  .
  2. Tap Device Settings.
  3. Tap Motion Settings
  4. The first setting is Motion Detection. Tap the toggle to turn On or Off.

Snooze Motion Notifications

Use this article to understand how to use Snooze for motion-activated notifications. The Snooze option allows you to temporarily pause motion event notifications being sent to your mobile device. 

For example, if you are receiving too many motion notifications from your camera you can temporarily stop receiving all motion notifications. The camera; however, will continue to record clips.

Since Snooze is on a timer, it will automatically disable the pause after the desired length of time is reached. 

  • The length of time is 30 minutes. You can also select 1, 2, 3, or 4 hour increments. 
  • If you are subscribing to a Blink plan, you can use Custom Snooze, that lets you specify the length in 1-minute increments up to 24 hours.

Turning on Snooze Notifications

  1. On your camera's thumbnail, tap More 
  2. Tap the Notification Snooze button. Choose how long you want the Snooze to last. 
    • Select 30 minutes (default) or up to 4 hours. If you want to cancel, tap the back arrow.
  3. Once you've chosen your snooze length, tap Start Snooze. 
    • If you'd like the Snooze to apply to all of the cameras in your system, check the box next to Apply to all devices.
    • When your camera's notifications are being Snoozed, the Notification Snooze icon  will appear to the left of Motion Detection .

Turning off Snooze Notifications

  1. When Snooze is active, the icon turns solid blue . Tap an active snooze to end it early. A confirmation message displays the amount of Snooze time remaining. You can tap the X in the upper-right hand corner to continue the active snooze or select End Snooze.
    • The Snooze icon will switch back to gray .
    • Tap the Apply to all devices checkbox to end Snooze for all cameras on the system.

Alexa Snooze Notifications

Alexa will continue announcing events even if you have turned on Snooze notifications for your camera or system. To turn off Alexa Motion Announcements, follow these steps:

  1. Go to the Alexa app.
  2. Go to Settings > Device Settings.
  3. Select the device you want to stop the announcements for.
  4. Under ANNOUNCEMENTS, turn off Motion Announcements

If you want Alexa to resume announcing motion notifications, you must turn on Motion Announcements in the Alexa app.


Setting a Custom Snooze notification

When you have a Blink Plus Subscription Plan or trial, you can set a Custom time frame for snoozing your motion notifications and enter any time increment from 1 minute and up to 24 hours. Learn more about Blink Subscription Plans extra features and benefits for your devices.

1. Tap the More button settings icon on the home screen and select Notification Snooze and then Custom.

2. Select the amount of time to Snooze your notifications and then tap Start Snooze. You have the flexibility to select any time between 1 minute and 24 hours to stop your notifications.

Your set custom Snooze time will then appear as a notification on the Home screen.

Learn more


Motion Zones

Setting Activity Zones allow you to eliminate areas in your camera's field of view which may be causing too many motion notifications. Use this article to understand how to set and reset Activity Zones in the Blink app.

Activity Zones allow you to select areas for your camera to ignore. This can help with excessive motion clips or false alerts. For example, if your Outdoor camera view has a tree or bush that is triggering unwanted motion clips, you can adjust your Activity Zones to exclude that area. The camera will ignore the motion occurring in the Activity Zone which prevents sending unwanted motion notifications.

Privacy Zones

Privacy Zones allow you to block off areas in your camera view that will not be recorded. Privacy Zones are only available for the Wired Floodlight, Video Doorbell and Indoor and Outdoor (3rd Gen) Camera. 

Learn about on-camera Privacy Zones.

Creating Activity Zones

  1. Choose the camera that you want to add Activity Zones to and tap More. Then select Device Settings.
  2. From Device Settings, select Motion Settings and then tap Motion Zones.
    Activity Zones
  3. On the Activity Zones screen, the most recent thumbnail is shown with a grid pattern.
    Tap Update Photo to refresh the thumbnail image so your settings are accurate.
    Activity Zones config
  4. Select your desired inactive Activity Zones by tapping on the rectangle you would like to isolate. A selected area will become grayed out. The area within the gray square will not detect motion, even if motion occurs.

    In the example below, bushes and plants are chosen as inactive Activity Zones since these outdoor elements may cause unnecessary motion events.
    tap the squares that you DON'T want to record motion clips

Optional: Basic and Advance modes

Optional: Basic and Advanced options are included for Wired Floodlight, Indoor and Outdoor (3rd Gen), and XT2 cameras.
Activity Zones settings\

Advanced mode allows you to zoom into the thumbnail for more precise zone selection. Swipe to move the view and tap to select areas that are active or inactive for motion detection. When you're done, tap Save.

Advanced mode

  1. After you've selected your desired inactive Activity Zones, tap Done. To make all zones active and restart the process, tap Reset Zones.
    click done button to complete settings


Activity Zones

If you're experiencing issues with Activity Zones, it's important to understand how Activity Zones work. 

In a typical event without Activity Zones enabled, the camera uses the Passive Infra-Red (PIR) sensor to detect motion. If a person walks past the camera, that person has a different temperature than the background image that the PIR sensor has been looking at and it triggers a motion event.

Activity Zones are active

With Activity Zones, the camera uses the PIR sensor in addition to analyzing the image to look for changes. The camera analyzes the motion event over the course of two seconds and looks for pixels in the images changing. 

  • If the camera sees pixels changing within an Activity Zone, the camera turns off and stops recording. 
  • If the camera sees pixels changing in non-Activity Zones, the camera continues to record and will send the notification.


In certain situations, pixels can change outside of your Activity Zones when there technically isn't motion.

  • Example: Your camera is pointing toward the street, but you have Activity Zones on the part of the view that is the street to keep passing cars from sending you notifications. During the day, Activity Zones function as intended. However at night, a car's headlights could shine into areas outside of your Activity Zones. This could be perceived as motion by the camera, as it would see pixels change, and therefore send you an unwanted notification.

To fix the above scenario, you may need to fine tune the precise positioning and angle of the camera, as well as adjusting Activity Zones so that you can find out what works best in your environment. 

If you're continuing to have difficulty with unwanted notifications, learn more by visiting Troubleshooting Motion Notifications.



The Blink Video Doorbell can use Activity Zones to block off areas of activity where you do not want alerts. In addition to using Activity Zones, Blink offers the Wedge or Corner Mount to help you shift the camera view enough to avoid unwanted motion alerts.

When the doorbell is pointed toward a street for instance, traffic may cause unwanted alerts. Using a wedge mount to point the camera 5º down can help this situation by moving the main activity zone below the horizon.

The Wedge changes the doorbell camera view up or down 5º.
The Corner Mount changes the view 25º to the left or the right.

Learn more about installing a wedge or corner mount‍.


If you continue to have issues, please submit a ticket to Customer Support.


Privacy Zones

A Privacy Zone is an area you select that will not be recorded by your camera. For example, you may want exclude a neighbor's door or window from being viewed or recorded by your camera. Up to two Privacy Zones can be set and they are easily recognized as gray areas of the screen.

Note: Privacy Zones are only available for the Outdoor 4, Wired Floodlight, Video Doorbell and Indoor and Outdoor (3rd Gen) Camera. 

Creating Privacy Zones

  1. Choose the camera that you want to add Activity Zones to and tap More  located at the bottom-right corner of the device thumbnail to access Device Settings.
  2. From Device Settings, select Motion Settings and then tap Motion Zones.
    Activity Zones

  3. On the Motion Zones screen, tap Privacy Zones at the top.
    The most recent thumbnail is shown with a grid pattern. Tap Update Photo to refresh the thumbnail image so your settings are accurate.
  4. Tapping Reset Privacy Zones deletes the existing zones. Privacy Zones cannot be edited, only deleted (reset) and recreated.
  5. Tap and drag on the screen to draw up to two zones you want selected within the thumbnail image. Once zones are created they can be moved and resized by dragging on the blue dots at the corners of each.
    camera settings

  6. After your zones are drawn, tap Done to save them. You can tap Save to apply all settings changes and be sent to the Home screen.
  7. If you tap Zones again, the Zones screen now shows the Privacy Zones in black to help contrast with activity zones, which are grey in the Activity Zone view.

Retrigger time

This article describes how to adjust the retrigger time for your Blink camera. 

Retrigger time is the amount of time between the end a motion capture and beginning of a new motion event. During the retrigger time, your camera does not record motion events. 

By default, the system will capture a five second clip, and wait for the retrigger time of 30 seconds. If motion continues, the camera will capture another five second clip. Retrigger time can be adjusted under Device Settings.

Note: Each camera in your system has an individual retrigger time setting.

Adjusting the Retrigger Time

  1. From the Home screen, tap the More  button and then select Device Settings.
  2. From the Device Settings screen, tap Motion Settings.
  3. In Motion Settings, you can adjust the Retrigger time value from 10 to 60 seconds. To increase the retrigger time, move the slider to the right and to decrease the delay move the slider to the left.
    • The longer the retrigger time is set, your camera allows more time between notifying you of the next motion event it detects. This is useful if your camera views an area where motion occurs often or if you are getting false triggers.
  4. When you have this setting where you want it, tap Save.

Test your settings

After you have set your desired retrigger time, Arm your Blink system and then walk through the field of view of your adjusted camera. You will receive a motion alert on your screen. Continue to walk through the field of view of this camera for the length of your delay. You will receive a second motion alert when your system has captured another clip. If the retrigger time was too short or too long between captured clips, return to camera settings to fine tune.


Adjusting Sensitivity for your Blink Camera

Your Blink camera captures motion based on heat moving across the camera's field. The total size of heat objects and amount of motion together cause a motion event. Your camera's Sensitivity setting adjusts how much input it takes to send you a notification.

Low sensitivity is less responsive, so a larger amount of heat and motion are needed to cause a notification. The highest setting may cause alerts from blowing leaves or even shadows.

If you are receiving too many notifications with nothing interesting, try reducing the Sensitivity down two levels. If that is effective, test by arming the system, and walking in the field of view when Motion Detection is on, to make sure a human sized object will trigger a notification.

Be careful if you tap the notification and enter Live View with your microphone or speakers on, significantly loud feedback may occur. Tap mute speaker in the upper right corner of the Live View.

Each camera has an individual sensitivity setting. You can find this in the Camera Settings for each camera in your system.

Choosing High or Low Sensitivity

The sensitivity setting on your camera not only depends on what is making the movement, but how long the movement is occurring. 

  • High sensitivity means less motion over a shorter period of time will create a notification.
  • Low sensitivity means more movement over a longer period of time will create a notification. 

The motion can be a big or small object, or a lot of small objects. Motion detection depends on where the object is in relation to the camera lens. For example, a bird flying close to the camera can be perceived as bigger than the person walking on the sidewalk in the distance. A person walking directly toward the camera will produce less motion than a dog walking left to right across the camera's field of view. It's about the amount of motion that's occurring within the detection zone of the camera and not necessarily how large the object is.

Testing sensitivity for your home camera

  1. Tap More  on your camera's thumbnail and select Device Settings .
  2. Select Motion Settings.
  3. On Motion Sensitivity, move the slider two or three increments to the left for a lower numeric setting. Tap Save to save this setting and walk out of the frame of view of this camera.
  4. From the main screen of the Blink app, set your system to Armed to enable Motion Detection.
  5. Test the camera sensitivity by introducing movement.
  6. If the sensitivity is not successful, reduce the slider more, save, and try again.
  7. If you have adjusted the sensitivity to your liking, proceed to test with a larger moving object, such as yourself. Walk in front of your camera and check to see if the setting gives the desired motion alert.
  8. If the lowest sensitivity continues to cause an unwanted Motion notification, you may need to create an Activity Zone instead. Learn more about setting Activity Zones.

Learn more


Early Notification

When Early Notification is enabled, your camera sends an alert when motion is first detected. If not enabled, Motion Alerts are sent after the Motion Clip is saved. Learn more about motion detection and notifications.

Early Notification is determined by clip length settings, network speeds, etc., and available for the following Blink devices:

  • Blink Outdoor and Indoor (3rd Gen)
  • Mini
  • XT2

Early Notification is enabled by default and can't be turned off on the Blink Mini 2, Outdoor 4, Wired Floodlight and Video Doorbell.

Why would I use Early Notification?

A real advantage of Early Notification is being able to enter Live View if you tap the Motion Alert notification, when you're within the time frame of that clip length, or five seconds after. In this way, you can be interacting with visitors using two-way voice, or viewing whatever triggered the motion alert, within a few seconds of receiving your notification.

Note: If you pass the five second time frame after the clip has ended, you will be automatically taken to the clip list screen with no clip selected.

Can I save the Live View session?

If you have an active Blink Subscription Plan‍ and your camera supports recording the Live View session, a Save / Discard toggle appears in the live view. When the toggle is set to Save, the current session records until the timeout, or when you stop the Live View by tapping Close.

How do I use Early Notification?

To enable Early Notification:

  1. Tap the More Blue Moments Icon button located at the bottom-right corner of the device thumbnail.
  2. Tap Device Settings.
  3. Tap Motion Settings.
  4. Toggle on Early Notification.

Early Notification is off by default for Blink cameras, as shown in the image.


End Clip Early if Motion Stops

How to enable the setting

  1. From the Home screen, tap More on your desired camera and then tap Device Settings.
  2. From the Device Settings screen, tap Video and Photo Settings.
  3. Find End Clip Early if Motion Stops. Tap the switch to turn it on.

Note: Not available for the Wired Floodlight Camera.

What does it do?

When this setting is switched on, your camera stops recording a video clip if motion is no longer occurring before the Clip Length reaches its stopping point.

For example, let's say your Clip Length is set to record for 30 seconds after motion is detected, and a car passes by your camera's view.

  • Setting off: The camera will keep recording until the set Clip Length is reached. In this example, the clip would be 30 seconds long.
  • Setting on: Your camera would record the clip of the car passing by and end immediately afterwards if no more motion occurs.

This feature may not always end the clip early under certain conditions.


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