Item Type: Door Stop Alarm <br>Battery: 9V Alkaline Battery (Without Batteries)<br>1、Various Application: The security system is designed to fortify your home with an additional protection, perfect solution for apartments, mobile homes, offices, hotels, garages and so much more. <br>2、Safe and Secure: This door window alarm can instantly detect any movement in your door or window, magnetic sensor, extremely reliable in any condition. <br>3、User Friendly: The door alarm for home security system is intuitive and easy to use functionality. Move the sensitivity switch to H, M and L, which means to adjust the high, medium and low sensitivity of pressure sensing. <br>4、Easy to Install: The alarm system can be easily installed, can prevent children from sneaking out, and intruders from breaking in, ensuring safety at all costs. <br>5、Smart Design: When the power switch at the end of the door stopper is turned off, the 120 dB treble siren is not activated and the alarm sensor can be used as a regular anti slip door stopper.1 x Door&nbsp;Stop&nbsp;Alarm