DOOR AND WINDOW HOME SECURITY ALARM,DOORBELL
Easy to install--just peel and stick.
Alarm is activated when the two pieces are separated .(refer to the following picture)

Technical Parameter:
Power supply: three 1.5VLR44 button cells
Button:chime,off,alarm.
Quiescent current: 3~6uA
Temperature: -10°C ~ +50°C
Alarm decibel: 90dB
Size: Main frame: 62x30x20mm
      Magnetic box: 55x11x11mm
Color:white

 

Applicable scope ：Ideal entry warning for homes, apartments,  mobile homes, dorms, offices, hotel rooms, garages, and more!
1.Electronic Magnetic Sensor detects entry
2.Easily mounted to windows or doors with included mounting tape
3.Convenient on/off switch
4.Wireless unit has no cords 

The product RL-9805B can be installed directly on doors and windows. It is of high sensitivity and can be used to protect people  against stealing. It will give an alarm if someone opens the door or the window.At the same time,the product has a function of doorbell.

Price:FOB YIWU USD 0.35/PIECE