TALK LISTEN SIMULTANEOUS

radio repeaters; portable radio communication machines and apparatus; aeronautical radio communication machines and apparatus; vehicular radio communication machines and apparatus; marine radio communication machines and apparatus; radio communication machines and apparatus; radio machines and apparatus, namely radiotelephones, transceivers, IP transceivers, wireless LAN transceivers, cellular network transceivers; telecommunication machines and apparatus, namely radiotelephones, transceivers, IP transceivers, wireless LAN transceivers, cellular network transceivers; parts and accessories for telecommunication machines and apparatus, namely, microphones, audio speakers, headphones, batteries, battery packs, battery chargers, power supplies, amplifiers, transmitters, modulators, demodulators, remote controllers for transceivers, antennas, antenna tuners, headsets, wireless headsets, switches, alarms, electrical connectors, mounting brackets adapted for transceivers, mounting bases adapted for transceivers and straps adapted for transceivers; personal digital assistants; downloadable computer programs for communicating with radio communication machines and apparatus; recorded computer programs for communicating with radio communication machines and apparatus; downloadable computer programs for operating radio communication machines and apparatus; recorded computer programs for operating radio communication machines and apparatus