The Aeotec Door / Window sensor offers information whether a door or window is open or closed. The product consists of a magnetic element and the main unit. One of the parts is mounted on the moving part of the window or of the door the other part is placed on the frame. The installation can be done with screws or double-sided tape. Batteries can be changed without unscrewing the device from the door or frame. The unit will give a visual warning on the device and sends a warning to the Z-Wave controller, when batteries need to be replaced. The unit offers a tampering control and sends an alarm message when tampered. The units send information to a controller or any other associated Z-Wave device. The device needs to be included into a Z-Wave network by a remote control or any other Z-Wave controller.