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    $15.99
    Simplisafe - 1Pack Entry Sensor - White
    Best Buy
    80
    $15.99
    Simplisafe - 1Pack Entry Sensor - White
    Best Buy
    80
    $14.24
    Simplisafe Entry Sensor - Window And Door Protection - Compatible With Gen 3 Home Security System
    Amazon.com
    3K+
    $14.24
    Simplisafe Entry Sensor - Window And Door Protection - Compatible With Gen 3 Home Security System
    Amazon.com
    3K+
    $51.00
    Supreform IP67 Waterproof 40 Feet Range 10-30VDC Retro-Reflective Photoelectric Beam Sensor For Gate Opener, Garage Door Sensor, Driveway Alarm Sensor
    Amazon.com
    69
    Free shipping
    $51.00
    Supreform IP67 Waterproof 40 Feet Range 10-30VDC Retro-Reflective Photoelectric Beam Sensor For Gate Opener, Garage Door Sensor, Driveway Alarm Sensor
    Amazon.com
    69
    $54.99
    Simplisafe - 4Pack Entry Sensor - White
    Best Buy
    3K+
    Free shipping
    $54.99
    Simplisafe - 4Pack Entry Sensor - White
    Best Buy
    3K+
    $63.96
    Gutentry Gate Retro-Reflective Photoelectric Beam Sensor Waterproof Outdoor Reflection Photocell Infrared Red Beam Door Safety Sensor Gate Opener
    Amazon.com
    Free shipping
    $63.96
    Gutentry Gate Retro-Reflective Photoelectric Beam Sensor Waterproof Outdoor Reflection Photocell Infrared Red Beam Door Safety Sensor Gate Opener
    Amazon.com
    Free shipping
    $49.99
    Supreform IP67 Waterproof Universal 10-30VDC Safety Retro-Reflective Photoelectric Beam Sensor For 12VDC And 24VDC Gate Opener, Garage Door Sensor Up
    Amazon.com
    105
    Free shipping
    $49.99
    Supreform IP67 Waterproof Universal 10-30VDC Safety Retro-Reflective Photoelectric Beam Sensor For 12VDC And 24VDC Gate Opener, Garage Door Sensor Up
    Amazon.com
    105
    $41.39
    Request To Exit Motion Detector, 12-24V 24.125Ghz Automatic Door 24.125Ghz Microwave Motion Sensor Autodoor Sensors Microwave Motion Sensor Autodoor
    Amazon.com
    11
    Free shipping
    $41.39
    Request To Exit Motion Detector, 12-24V 24.125Ghz Automatic Door 24.125Ghz Microwave Motion Sensor Autodoor Sensors Microwave Motion Sensor Autodoor
    Amazon.com
    11
    $20.39
    $23.99
    Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry Alert
    Amazon.com
    3K+
    15% off
    $20.39
    $23.99
    Door Chime, Door Sensor Chime For Door Opens - Door Ringer With 500ft Operating Range 52 Chime Adjustable Volume Mute Mode LED Indicators -Entry Alert
    Amazon.com
    3K+
    $27.93
    Door Chime When Door Opens, Fullhouse Door Sensor Wireless Entry Alarm With 1000ft Range, 60 Chimes And 5 Volume Levels For Business/Store/Home/Office
    Amazon.com
    13
    $27.93
    Door Chime When Door Opens, Fullhouse Door Sensor Wireless Entry Alarm With 1000ft Range, 60 Chimes And 5 Volume Levels For Business/Store/Home/Office
    Amazon.com
    13
    $21.79
    Door Chime, METAK Wireless Door Open Contact Sensor Alarm With 500 ft Range, 58 Chimes And 5 Volume Levels For Business/Store/Home/Office When
    Amazon.com
    1K+
    $21.79
    Door Chime, METAK Wireless Door Open Contact Sensor Alarm With 500 ft Range, 58 Chimes And 5 Volume Levels For Business/Store/Home/Office When
    Amazon.com
    1K+
    $17.99
    3-In-1 Alarm - Door Left Open Chime With Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 To 120 Db, Time Delay
    Amazon.com
    697
    $17.99
    3-In-1 Alarm - Door Left Open Chime With Delay, 0/5/10/30/60 Seconds, 2/5 Minutes, Door Ajar Alarm, Close Gate Reminder, 80 To 120 Db, Time Delay
    Amazon.com
    697
    $34.99
    $54.99
    Swann - Wireless Motion Alert Sensor (2-Pack) - White
    Best Buy
    108
    36% off
    $34.99
    $54.99
    Swann - Wireless Motion Alert Sensor (2-Pack) - White
    Best Buy
    108
    $55.08
    Lascar Electronics WIRELESS ALERT DC SENSOR - DOOR SENSOR -
    DigiKey
    $55.08
    Lascar Electronics WIRELESS ALERT DC SENSOR - DOOR SENSOR -
    DigiKey
    $19.83
    $21.98
    Wifi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window Sensor With App Notification Alert, Contact Sensor For Home Security, Compatible
    Amazon.com
    24
    $19.83
    $21.98
    Wifi Door Sensor: Smart Door Open/Closed Detectors, Wireless Window Sensor With App Notification Alert, Contact Sensor For Home Security, Compatible
    Amazon.com
    24
    $39.99
    MENGQI-CONTROL Request To Exit PIR Motion Sensor Exit Infrared Detector For Exit For Automatic Opening Door Access Control
    Amazon.com
    63
    Free shipping
    $39.99
    MENGQI-CONTROL Request To Exit PIR Motion Sensor Exit Infrared Detector For Exit For Automatic Opening Door Access Control
    Amazon.com
    63
    $79.99
    Gate Opener Vehicle Exit Sensor, Driveway Gate Vehicle Exit Wand Sensor With 50 ft Cable, Compatible With Mighty Mule, Ghost Controls, Liftmaster
    Amazon.com
    24
    Free shipping
    $79.99
    Gate Opener Vehicle Exit Sensor, Driveway Gate Vehicle Exit Wand Sensor With 50 ft Cable, Compatible With Mighty Mule, Ghost Controls, Liftmaster
    Amazon.com
    24
    $28.79
    $31.99
    Sanjie Door Chime, Door Open Contact Sensor Alarm With 500 ft Range,26 Chimes 5 Adjustable Volume For Business/Store/Home/Office When Entering 2
    Amazon.com
    1K+
    10% off
    $28.79
    $31.99
    Sanjie Door Chime, Door Open Contact Sensor Alarm With 500 ft Range,26 Chimes 5 Adjustable Volume For Business/Store/Home/Office When Entering 2
    Amazon.com
    1K+
    $25.99
    METAK Door Chime, Wireless Door Open Contact Sensor Alarm With 500 ft Range, 58 Chimes And 5 Volume Levels For Business/Store/Home/Office When
    Amazon.com
    1K+
    $25.99
    METAK Door Chime, Wireless Door Open Contact Sensor Alarm With 500 ft Range, 58 Chimes And 5 Volume Levels For Business/Store/Home/Office When
    Amazon.com
    1K+