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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 - - Amazon.com
Amazon.com: Mengshen Infrared Motion Sensor Alarm - Burglar Alarm with 2 Remote Controls, Suitable for Home/Garages/Shops, H88 : Electronics
Tuya Kit Pro GSM 4G + WiFi Video Alarm System with Alexa and Google
Amazon.com : WiFi Smart Wireless Home Alarm, 10 Anti-Theft Kits with 5 WiFi Door Sensors, 2 Remote Controls, 1 Motion Sensor, 1 Siren, Alexa, Tuya, Google Home : Electronics
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Amazon.com : Home Zone Security Smart Wireless Door, Window Sensor and Security Siren Alarm Kit - DIY APP Controlled Security Kit with No Subscription Needed, Batteries Included (5-Pack) : Electronics
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 - - Amazon.com
Amazon.com: Fosmon Anti -Theft Burglar Alarm with Remote, Wireless Window and Door Open Entry Alert Magnetic Contact Sensor Battery Operated Loud 130decibel Siren for Home Security, Business, Kids Safety (2 Pack) :
X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector with LCD Display & 10-Year Battery, Over 820 ft Transmission Range, 3-Pack - - Amazon.com
Tuya Wireless Home Security Alarm System | Smart Wifi Home Security Alarm System - Alarm System Kits - Aliexpress
Digoo Alarm
Google Nest Home WiFi System 2-Pack w/ Chromecast with Google TV for $153
Amazon.com: Linear DVS-2400: 24-channel Supervised Wireless Security Console : Electronics
Wireless Doorbell, Waterproof Chime Battery Power Loud Door Bell Kits with 1 Push Button 3 Plug-in Receivers - 55 Melodies for Home Classroom Door Entry Chime (3 Receivers + 1 Buttons) - - Amazon.com
Amazon.com: Smart Tracker Key Finder Locator Anti Lost GPS Tracker Wireless Anti Lost Alarm Sensor Device Finder Mini PET GPS Tracker for Kids Locating Phone Keys Wallets Luggage Item Finder, Black (6) :