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Tapo Smart Contact Sensor, Real-Time Monitoring Smart Window & , Instant Push Notification,Battery included,Easy Installation,Work with Alexa,Tapo Hub Required separately(TapoT110), packaging may vary

SECRUI Wireless Door Open Sensor Alarm Chime, 400ft Operating Range 52 Chimes Adjustable Volume with Mute Mode LED Indicators Magnetic Door Alarm Sensor for Home Store Office Security

VOXON Wireless Door and Window Alarm Sensor 2 Pack 2 Modes Magnetic Window Door Burglar Alarm with 100dB Loud for Kids Safety Home Shop Security

Yale AC-DC Sync Alarm Door/Window Contact - Sync Smart Home Alarm - 200m range

eufy Security, Entry Sensor, Detects Opened and Closed Doors or Windows, Sends Alerts, Triggers Siren, 2-Year Battery Life, Indoor-use Only, Requires HomeBase S280 or HomeBase S380

Defender Door Handle Alarm - Wireless Hanging Intruder Alarm for Metal Door Handles - 125dB Siren Movement Detector - Door Knob Touch Sensor

Door Window Alarm 2 Pack Noopel Home Security Ultra-Slim Wireless Magnetic Sensor Burglar Anti-theft 120DB Alarm with Batteries included - DIY EASY to Install

TECKNET Door Alarm Sensor, Window Alarm Sensors, 2-in-1 Alarm & Chime, 3-level Volume Control, Door Sensor Alarm for Home Security, Wireless Burglar Alarms for House, Shop, Office, Garage (3 PCS)

Aqara Door and Window Sensor, REQUIRES AQARA HUB, Zigbee Connection, Wireless Mini Contact Sensor for Alarm System and Smart Home Automation, Compatible with Apple HomeKit, Alexa, Works With IFTTT

TECKNET Wireless Door and Window Open Sensor Alarm Chime, 1000Ft Operating Range 61 Chimes Adjustable Volume with Mute Mode LED Indicators Door Open Alert, Door Alarm Sensor for Home Store Office

4 Pack Door Alarms for Home Security, Window Door Alarms, Window Alarm Sensors, Door Alarms for Kids Safety,DIY Protection Burglar Bell Alarm for Home,Office

Mengshen Wireless Vibration Alarm, Anti-theft Burglar Alarm for Bicycle/Bike/Motorcycle/Car/Vehicles/Door/Window, 110db Super Loud (Remote Control Included)

Ring Alarm Glass Break Sensor

Door Alarm with Remote 2 Pack, Door Chime for Business When Entering, 130db Window Alarm Sensors for Kids Safety Home Security, Adjustable Volume

Defender Ultra Slim Vibration Alarm 2 Pack - Window Alert Alarm Sensor Smash Glass Siren 130dB - Police Recognised Standards

2 Pack of Burglar Alarm Door/Window Contact Detectors - Wired - White - Professional Quality

Bicycle Alarm,Wireless Waterproof Anti-Theft Bike Alarm with Remote Control,7 level Sensitivity Burglar Security Alarm, 113dB Super Loud Sound, for Bicycle/Motorcycle/Window/Electric Tricycle/Door

Yale Locks HSA6060 Alarm Accessory - Remote Keyfob, Wireless, White, 15 x 75 x 137 mm [ Not compatible with EF-KF system ]

WiFi Door and Window Sensors,Tuya Smart Alarm with Free Notification APP Control Home Security Alarm System, No Hub Required,Compatible with Alexa, Google Home (1-pack)

Personal Security Window & Door Alarm Bell | Wireless Sensor Door Window Burglar Alarm | Pack of 10

SimpliSafe Entry Sensor - Window and Door Protection - Compatible with SimpliSafe Home Security System

KINOEE Bicycle Alarm, Anti-Theft Burglar Wireless Alarm with Remote Control for Bicycle/motorcycle/Electric Tricycle/car/door/window, Waterproof,113dB Super Loud Sound, 7 level Sensitivity

SONOFF SNZB-04 ZigBee Wireless Door Window Sensor, Send Alert to Your Smartphone for Home Security, Compatible with Alexa/Google Home, SONOFF Zigbee Bridge Required, Batteries Included

Defender Shock Contact Alarm - Wireless Shed Alarm 130dB Siren - Garage Alarm - Internal Burglar Alarm for Sheds Garages - Wireless Magnetic Contact Alarm for Doors - Batteries Included

SANJIE Wireless Door Open Alarm Sensor Chime for Home Security Business Shop Office When Entering,Shop Entry Chime System, 800FT Long Range,55 Ringtones 5 Volume Level 2 Receivers 1 Sensor

Meross Smart Door Window Sensor, Meross Hub Required, WiFi Mini Door Contact Sensor for Burglar Security Alarm and Home Automation, Real-Time Alert, Works with HomeKit, Alexa, Google Home, SmartThings

SONOFF SNZB-04P Zigbee Door Window Sensor, Send Alert to Your Smartphone for Home Security, Compatible with Alexa/Google Home, SONOFF Zigbee Bridge Required, Batteries Included

EZVIZ WiFi Temperature & Humidity Sensor, Requires Home Gateway A3 for Instant APP Notification Alerts, Smart Mini Hygrometer Wireless Indoor Thermometer, Real-Time Monitor, Data Recording (T51C)

WER Doberman Security Slim Loud 100dB Alarm and Vibration Sensors-Modern & Ultra-Thin Design Compatible with Home, Office, Dorm Room or Even RVs

SONOFF DW2-WiFi Door Window Sensor, Mini Wireless Door Window Alarm System, Smart Monitoring Device for Home Security, Works with Alexa and Google Home, 2.4 GHz WiFi Only, No Hub Required

Ring Alarm Outdoor Contact Sensor

Eve Door & Window (Matter) - Smart Sensor for Doors & Windows, Automatic Control of Accessories, Privacy, Matter/Thread, for Apple Home, Alexa, Google Home, SmartThings, requires Thread Border Router

Wireless Home Security Alarm System DIY Kit - Magnetic Sensor - Guardian Protector - Window Glass Vibration Security Burglar Alarm for Homes, Cars, Sheds, Caravans, Motorhomes (6)

2 Pack SONOFF SNZB-04P Zigbee Door Window Sensor, Send Alert to Your Smartphone for Home Security, Compatible with Alexa/Google Home, SONOFF Zigbee Bridge Required, Batteries Included

GuDoQi Door Alarm Sensor, Wireless Remote Window Alarm, 2 Remote Controls, 130 dB Siren, Magnetic Security Sensor, Entry Burglar Alert, Security Alarm Warning System for Home, Shop, Kids Safety

Wireless Magnetic Door Sensor 600Ft Operating Range 58 Chimes Adjustable Volume with Mute Mode LED Indicators 1 Plug-in Receiver 1 Magnetic Door Alarm Sensor for Home Store Office Security White

Gebildet 5pcs Recessed Wired Security Window Gate Contact Sensor Alarm,Magnetic Reed Switch White,Magnetic Door Sensor,Magnet Near - Connect Circuit, Magnet Away - Break Circuit

2 Pack Window Alarm Ultra Slim Vibration Alarm 130dB Window Alarms for Security Shed Door Alarm Sensor Glass Break Alert Alarm Sensors for Home, Office, Dorm Room, RV

Mengshen Wireless Anti-Theft Alarm Security Motion Sensor Siren for Bike Motorcycle Scooter Door Window Vehicle 110db with Remote Control

Panamalar Door Window Sensor Wifi Door Alarm System, Detects Opened and Closed Front Back Garage Door, Sends Alerts, Alexa Google Home Compatible, Smart Auto Switch on Lights Accessory

LE Sircut LEMS-101-5, 5pcs Recessed Wired Security Door contact Sensor Alarm Magnetic Reed Switch, Magnetic Door Sensor,Magnet Near - Connect Circuit, Magnet Away - Break Circuit

Fixget Pack of 8 Magnetic Door and Window Security Entry Alarm System WirelessMini Alarms Burglar Intruder Entry Warning Sensors White (Battery Included)

QWORK® 3Pcs MC-38 Wired Security Window Gate Contact Sensor Alarm -Normally Open - Surface Mount Magnetic Reed Switch Magnetic Door Sensor

SwitchBot Door Alarm Contact Sensor - Smart Home Security Wireless Window Alarm and Door Sensor, Add SwitchBot Hub Mini to be Compatible with Alexa

WOWSEA DOBERMAN SECURITY Ultra-Slim Window Alarm - Loud 100dB Alarm and Vibration Sensors - Modern & Ultra-Thin Design

SimpliSafe Glassbreak Sensor Window Alarm - 20ft. Range with Smart Sound Detection Technology - Compatible with SimpliSafe Home Security System

Magnetic Door/Window Alarm Doorbell, Wireless Security sensor Burglar Alarm System Loud 90 dB, Shed Garage Vibration Entry Warnning Detector, for Office/School/Hote/Hom/Store Security (10)

Door Handle Alarm Window Sensor Alarm 120dB Door Alarm for Home Security Touching Vibration Triggered Security Alarm for Travel Hotel Apartment Home Security