[MP3 players; navigation apparatus for vehicles in the nature of on-board computers; DMB, digital multimedia broadcasting receivers; PMP's portable multimedia players; PDAs, personal digital assistants; camera modules for mobile phones;] headphones; earphones; audio speakers; [microphones; cordless phones;] earphone microphones; headsets, namely, mobile headsets and wireless headsets for use with telephones, computers and radios[; receiver units, namely, receivers for mobile devices and recei...