Door/Window Sensor for Alarm System 433MHz  The 433MHz Door/Window Sensor for Tuya Alarm System is a reliable security solution designed to enhance your smart alarm system. Operating on the stable 433MHz frequency, this sensor detects the opening and closing of doors and windows, instantly triggering alerts to keep your property secure. Fully compatible with Tuya smart devices, it seamlessly integrates into your existing system, offering real-time monitoring and peace of mind. Ideal for both residential and commercial use, this sensor provides an easy and effective way to safeguard your entry points. Wireless Frequancy : 433MHz Battery : CR2032 (Not Included) Detection Range : 50~100mm Wireless Distance : 50~80m (Open Space) Package Size 10x5x2cm G.W. : 0.070kg