The Aeotec Z-Wave Door/Window Sensor 7 Pro discreetly monitors your chosen entryways or important storage. The Door/Window Sensor 7 Pro consists of two parts: the main sensor and a magnet. The sensor can be mounted onto either the door/window or onto the frame. Two magnets are included: a standard magnet cover by plastic that mounts beside the sensor on either the door/window or frame, and a slim "naked" magnet that mounts behind the sensor when the sensor is placed on the side of a door/window. When the two components are separated, the sensor sends signals to up to 7 Z-Wave devices to alert of the change in status or to trigger security or automation events. Contents: Z-Wave Door/Window Sensor 7 Pro. Cover. Big Magnet. Small Magnet. Double-Sided Tape Large (2). Double-Sided Tape Small (2). Screws (4). Dowels (4). NOTE: Requires a Z-Wave network controller, sold separately. For indoor use only. Should not be mounted on a metal frame. Manufacturer Part #: ZWA012.