Wireless Home Security Door Window Alarm Warning System 90db Alarm Sound Magnetic Door Sensor Independent Alarm Wireless Open Door Detector

Features:
When the magnetic block and the magnetic strip is closed, the distance control in 1CM or less, it will not alarm. 
When the magnetic block and magnetic stripe more than 1CM apart, it will be issued 90db alarm sound.
No complicated installation tools are required. The sensor can be installed with double-sided adhesive tape (attached) to the door/window frames in just a few steps.
Stick alarm and its accessory for your case and PC cover or two windows respectively. Align these two elements and leave a 5mm distance between them. 
If someone trys to open your PC case or window illegally, the alarm will be activated. 
Made of ABS+PC material, super quality fire resistance and stable performance.

Specifications:
Power Supply: 3*1.5V IR44 batteries (included) 
Standby Current: ≤5μA
Standby Time: 4-6months
Alarm Sound: 90db
Alarm Distance: ≥1cm
Material: Superior ABS 
Operating Temperature: -10℃~ 40℃
Operating Humidity: 20% ~85%
Size: Main body (D*W*H): 53*35*23mm
Deputy body (D*W*H): 51*18*20mm

Package Information:
Package Size: Approach. 13.8*9*2.2cm / 5.4*3.5*0.87in 
Package Weight: Approach. 43g / 1.5oz

Package List:
1 * Wireless Door/Window Detector