A Convenient and practical security door alarm. With a loudness of 120 dB alarm; ultra small size 98X55X25 mm and lightweight. Alarms at the outside of the door before thief enters into, which is safer.
As long as the thief touches the door handle, it will alarm and siren automatically and include the condition which the theft wear glove .10 seconds to siren after it is triggered.
Just by touching door handle ,it alarms:
For wood door only with a metal handle ( plastic handle will not make alarm work )
Powered by 9V battery ( not AA battery ) , battery not included