home burglar alarm device, based visual physiology, combining barrier-free technology and wireless communication technology, using human design, achieve radiation-free, low consumption, multi-way safety note. When the door or window opened, the magnetic touch alarm device is activated. And the alarm way is flexible, which can remind people by flashing or siren or vibration, or both of them, according to peoples choice, and the installation is simple. 2. Technical Specifications: <1>Technical specification of alarm device: Components: Transmitter and receiver Input battery: DC12vA23 AC 220V 50Hz Rated Power: 15mw 5w Environment Temperatur: -5~45 -5~45 Size: 7.8*3.6cm*1.6cm (transmitter) 11cm*7.6cm*5cm (receiver) <2>Technical Specification of vibrator Components: Vibration disk Input battery: DC 9V (battery model: 6F22) Rated powe: 1w Environment temperature: -5~45 Size: 10cm*10cm*3cm