1. Material: ABS2. Battery: LR44X3 (included)3. Host size: 65x34x16.5 mm4. Weight: 42g5. Remote control size: 36x10x14 mm6. Sensing range: 8-15 mm7. Standby time: about 1 year8. Standby current: less than or equal to 6uAh9. According to the triangle mounting marks of door sensor and magnetic stripe, it can be installed in left and right adjustment positions10. 5 modes of alarm/doorbell(alarm 30 seconds mode, doorbell mode, alarm mode, beep mode and delayed alarm mode), can be installed in both directions, 130dB super loud alarm sound12. Working principle: when the door is opened, the door magnet and the magnetic strip are separated and the 8-15 mm alarm sounds and closes to stop the alarm

http://olla.gr/mc-03-130db-multi-function-door-and-window-anti-theft-alarm-with-5-modes/