eTIGER ES-D4F Long Distance Wireless 433MHz Door Sensor Roller Shutter Metal Rolling Door Magnetic Contact Sensor

Features:
*Wireless 433MHz roller shutter door sensor, special for rolling shutters, easy to install with simple wiring.
*For installed in the door or window to monitor the door/window switch state if it is opened or moved.
*It is widely used for monitoring and security system, with high reliability, small size and strong flexibility.
*Metal plating housing, kirsite material for commercial application or industrial use.
*Ideal intrusion warning for homes, apartments, dorms, offices, garages, warehouses, etc.