Features:
1. This product is specially designed for the protection of rental single apartments and commercial houses. Whether you are at home or going out, it will give you all-round security and life safety.
2. Immediately call the police when a thief pushes a door or window.
3. A magnetic sensor can be freely matched with up to 8 remote controls.
4. One remote can control multiple magnetic sensors.

Name:  Magnetic Sensor

Material ABS
Alarm response time 200ms
Voltage 12V 27A
Standby time 12 months
Volume 110DB
Standby capacity 1uA
Working volume 15mA
Remote control distance 20m
Power 2 x AAA batteries
Dimensions: 3.34x1.65x0.59 inches (85x42x15mm)

Packing list:
1 x Magnetic Sensor
1 x Magnetic rod
1 x remote control
1 x user manual
Note:
Different displays may cause the color of the item in the picture a little different from the real thing. 
Manual measuring,please allow 1~3mm error,thank you.