MESSAGE AND/OR DATA ENTRY, PROCESSING, TRANSMISSION, EXCHANGE, STORAGE AND OUTPUT DEVICES, NAMELY, KEYBOARDS, COMPUTERS, DISPLAYS, PRINTERS, VIDEO MONITORS, DATA TERMINALS; ELECTRICAL DEVICES AND REMOTE CONTROL DEVICES, FOR SOUND RECORDING, TRANSMITTING AND REPRODUCING, NAMELY, MICROPHONES, [ MICROPHONE LOUDSPEAKERS, ] EARPHONES, HEADPHONES, HEADSET, [ LOUDSPEAKERS, ] ELECTRO-ACOUSTIC AMPLIFIERS, MICROPHONE CONTROL CONSOLES, MIXER CONSOLES, CHANNEL SELECTION AND MONITORING CONSOLES, REMOTE CO...