Pressing the push button will notify the receiver in a distant location with light and a chime sound. * For use as a doorbell or an intercom between rooms. * The transmitter is splash-proof, so it can be used outdoors. * Wireless, so no wiring is required. Size: Transmitter: Width 46 x Height 74 x Depth 23mm Receiver: Width 63 x Height 96 x Depth 33mm Although it is new and unused, it has been stored at home.