Patent ID: 7254420

Claim:
A hands-free device for use with a cellular telephone/two-way radio, the hands-free device comprising: a cable; a microphone coupled to the cable at a first location on the cable; a speaker coupled to the cable; a switch coupled to the cable at a second location on the cable; a button coupled to the switch; an audio amplifier coupled to the cable at a third location on the cable; a plug coupled to the cable at a fourth location on the cable, for coupling the hands-free device to the cellular telephone/two-way radio; and wherein the hands-free device is configured so the speaker and the microphone operate with the cellular telephone/two-way radio during full-duplex cellular communications and during half-duplex two-way radio communications, and is configured so the button functions as a PTT button for half-duplex two-way radio communications, and as a send button for full-duplex telephone communications, when the hands-free device is coupled to the cellular telephone/two-way radio.