It is used to probe whether door,window,drawer is illegally open or not.It consists of the wireless alarm host and magnetic iron fixed box. Once the battery is put in, it will work. when it probe that the moving distance(opening door)is more than 30mm,the indicator light(red)will turn on,and the signal will be sent to the host. The host(If being in the arming state) will alarm the intruder by ringing the present siren,and automatically dial phone number preset at the same time.It can install the sc series host of different types. Detailed Selling Lead Description 1. Technique index sign Power supply power supply: DC=12 Vs Vs-8.4(the inside places the A23 DC= a dry battery) The electric current of: I1 20 A Shoot the electric current: The 15 mA of I2 Shoot the frequency: F=315 the 0.2 MHz of ? Shoot time:1 second Shoot the distance: Have no obstacle distance 80 ms; Leave to match the distance<15 mms Work environment: Temperature-10-40 C Opposite degree of humidity:90% of 2. Install The wireless magnetic switch parts AN installs to show the directions gearing in drive a frame or window frames that monitors lastly, the wireless magnetic B install in drive door or windows that monitors, please press diagram after packing the battery, between this two part must be apart from more near more better. 3. Usage Installing good empress had better pull up all the antenna, then open to is monitored doors and windows, on the magnetic switch red