1.100% BRAND NEW!
2. Easy installation
3. No wiring required
4.105dB instant Alarm!
5. Secure doors and windows
6. Decline unauthorized entry
7. Low power standby comsumption
8. Easily mounted by adhesive tape to windows or door (included)
9. Magnetic sensor switch detects entry protecting your home or office you are in or out
10. Operated by 3pcs 1.5v LR44 button cell (battery included in package)