Acoustic amplifiers for mobile devices; Amplifiers; Amplifiers for wireless communications; Audio speakers; Audio transmitter units; Chip card readers; Computer keyboards; Earphones; Electrical amplifiers for use with musical instruments; Guitar amplifiers; Keypads for use with computers, tablet computers, cell phones; Loud speakers; Loudspeaker systems; Loudspeakers, headphones, microphones and CD players; Megaphones; Microphone modules; Musical instrument amplifiers; Public address (PA) and...

Amplifiers; Earphones; Megaphones; Acoustic amplifiers for mobile devices; Amplifiers for wireless communications; Audio speakers; Audio transmitter units; Chip card readers; Electrical amplifiers for use with musical instruments; Guitar amplifiers; Keypads for use with computers, tablet computers, cell phones; Loud speakers; Loudspeaker systems; Loudspeakers, headphones, microphones and CD players; Microphone modules; Musical instrument amplifiers; Public address (PA) and sound system access...