telephone apparatus, namely intercoms; FM radio intercoms with integrated alarm function; mobile communication equipment, namely transmitters, receivers, transceivers; remote sensors, monitors, signalers; controllers, simplex, duplex and multiplex radios; electrical and electronic signal generators, filters, and amplifiers; electronic entry, exit, threshold and access sensors and monitors, audio/visual indicators, electronic touch sensitive switches, encoders, decoders, encoded radios, single...