Door Stop Alarm,Security Door Alarm,Burglar Alarm

1. Door Stop Alarm
2. Using this alarm to block the door from being opened
3. If any body tries to open the door, the alarm will sound
4. This is also a movement sensor with adjustable.
5. Sensitivity to activate the door stop alarm if trampered with
6. Power supply :DC 9V battery(not included)
7. Alarm decibel: >85 db/3m
8. Temperature:-10~+40 
9. Humidity:<95%
10. Size:150*45*40mm.