Magnetic Contact Switch Design:Using a magnetic contact structure, the sensor detects the separation and closure of door panels with high sensitivity. It provides fast response, stable performance, and fewer false alarms, ideal for roller shutter doors, sliding doors, and metal doors. Anti-Theft Alarm Function:When connected to a Tuya/Smart Life security system or alarm host(not included), the sensor triggers a loud alarm and instant app alert as soon as the door is opened illegally. Effectively deter intruders and enhance your overall security system. Tuya & Smart Life App Integration:Fully compatible with Tuya and Smart Life platforms (requires a compatible 433MHz gateway/hub, not included). Receive real-time push notifications on your smartphone whenever the door status changes. Monitor your garage or storefront remotely and view alarm history at any time. 433MHz Wireless Transmission:Featuring 433MHz wireless communication, this contact switch ensures stable signal transmission with low power consumption and long working distance. It is suitable for use in large spaces such as supermarkets, workshops, parking garages, and storage facilities. Wide Application in Supermarkets & Stores:Perfect for supermarket roller shutters, shopfront doors, warehouse shutters, mall kiosks, and small businesses. Protect your cash registers, inventory, and valuable equipment after closing hours with reliable door status monitoring., Weight: 0.37588815671 Pounds, Manufacturer: NONDK