US Patent 10066820 Wall mounted battery-powered wireless device

A battery-powered wireless electronic device includes a housing defining an interior space including a battery compartment in which one or more batteries are removably mounted. A wireless transmitter is positioned within the interior space of the housing and is electrically connected to obtain power from the one or more batteries for transmitting a wireless signal. A connector is disposed on the housing for releasably connecting the battery-powered wireless electronic device to a wall mount that is fixedly mounted at least partially inside of the wall.