Antennas; Walkie-talkies; Audio headphones; Battery chargers; Battery chargers for tablet computers; Electronic data relays for sensors; GPS navigation device; Internet radios; Loudspeakers, headphones, microphones and CD players; Microphones for communication devices; Personal headphones for sound transmitting apparatuses; Portable radios; Radio receivers and transmitters for monitoring and controlling light emitting diodes in a network of street lights and for processing emergency signals t...