MC 31B Wired Magnetic Window Door Switch Sensor Contact Alarm Home Security Support Three Wires

Features : NO / NC switch. Magnetic sensor alarm, control the switch of the circuit via the built-in magnet. Easy to install, can connect with three wires ( not included ). Alarm when someone intrude into your places. Can be used in places like apartment, factory, etc.. Specification : Model: MC - 31B Material: Plastic Color: White Product weight: 0.0180 kg Package size (L x W x H): 13.00 x 9.00 x 2.50 cm / 5.12 x 3.54 x 0.98 inches Package Includes : 1 x Window Door Sensor 4 x Screw Details Pictures :