The MPPL Long Range Movement Sensor is compatible with all Medpage radio pagers and radio paging devices. For use in conjunction with the MPPL Pager (Product Code M99771), or as an additional or replacement sensor for the Long Range Pager (Product Code S14549).Ideal for detecting wandering or bed leaving, this sensor can also be used for general security in your home or outbuildings. This Long Range Movement Sensor comes supplied with a wall mounting bracket and Velcro fixing tape. When in long range mode, this sensor can transmit up to 400 meters.