US Patent 10121341 Retail merchandise hook with radio transmission

A signal-emitting retail display device that includes a wire have a top portion and a bottom portion, the top portion configured to support a label holder, the bottom portion configured to store one or more retail items. The signal-emitting retail display device also has an electronic unit that includes an emitter. The emitter is configured to emit an audible alarm or warning signal, and configured to wirelessly transmit a signal to a remotely-located alarm box indicative of the audible alarm or warning signal. The wire is electrically coupled to the electronic unit such that the wire functions as an antenna for the transmission of the signal to the alarm box.