The door/window detector has a built in magnetic contact that activates the security system when the window or the door were the detector mounted is open.This detector allows you to proctet all the entrances in the building.
The detector is powered by two AAA batteries and is connected with the security system via a wireless comunication, this means that the installation of the detector is simple and requires a minimum effort.
The security system checks if the detector is ok. If there is a fault (low battries, problems, etc.), she is reported to the security system.

The door/window send a radio signal to the security system installed at your home.You can add up to 30 wireless door/window detectors. When a door/window is open the detector sends a signal to the security system. If the system is not prepared, the security system sounds a warnig signal.
Every 90 minutes the detectors send a status report to the security system. The DS18 uses two AAA batteries, normally they last approximatly one year.
The DS18 has two terminals where we can connect na extra wired detector (the extra detector must have a NC output).