[Cabinets for loudspeakers;] Loudspeakers; Audio and Video Receivers; [Megaphones; Microphones;] Sound transmitting apparatus; [Horns for loudspeakers; Acoustic couplers; Headphones;] Portable media players; [Insert earphones; Transponders;] Transmitters of electronic signals[; Radios; Hands free kits for phones; Network communication equipment, namely, computer network hubs, computer network interface devices, and communications headsets for use with communication ]