There is an adjustment switch at the bottom of the door alarm. When the door is opened, the pressure sensor will give an alarm sound. Or placed at the window, as long as the product be touched, it will sound. The function of two placing way is consistent and both applicable.
When the power switch at the bottom is closed, the 120 dB sonic siren will not be activated and can be used as a normal non-slip door stopper.
No need to install, it is 2 pcs 1.5V battery-powered, easy to carry. Especially suitable for your going out to travel, as it can effectively give you an alarm in a strange place!
It is definitely a good helper for your home, office and travel security!
HOW TO USE THE DOOR ALARM:
Switch on the on/off button at the bottom of the door alarm.
Place the door alarm slightly under the door.
When door be opened, the alarm will go off(over 100 decibel).
Size:138mm x 60mm x 30mm
Power supply:2 pcs batteries powered(not included)