Easily mounted by adhesive tape to Window or door.
Magnetic sensor switch detects entry protecting your home or office whether you are in or out.
Warining door/windows sticker is supplied free in package.
Operating by 3* 1.5V R44/AG13 button cell(included)

Color:white
Size:63*30*20mm
Net weight:31g

Package include:
1* DOOR/WINDOW ENTRY ALARM

Package dimension:120*85*25mm
Package weight:38g