Acoustic couplers; Audio-video receivers; Cabinets for loudspeakers; Compact disc players; Computer peripheral devices; Data processing equipment, namely, couplers; Devices for wireless radio transmission; Electro-dynamic apparatus for the remote control of signals; Electronic circuit board; Headphones; Horns for loudspeakers; Integrated circuit cards and components; Megaphones; Microphones; Portable media players; Power amplifiers; Radios; Sound reproduction apparatus; Sound transmitting apparatus; Television decoder; Transmitters of electronic signals; Transponders