Patent ID: 7418277

Claim:
A hands-free apparatus, comprising: a Bluetooth earphone, which is able to dual communicate with a Bluetooth cellular phone, and comprises a connector socket for a first connector of a transmission element to connect with; the transmission element with two terminals of a first connector and a second connector, wherein the first connector is able to lodge in the connector socket of earphone, and the second connector is able to lodge in a connector socket of a car audio; the car audio, which comprises the connector socket, and the connector socket is able to connect with the second connector; and by the above-mentioned connection, the voice signal of the Bluetooth earphone is able to be transmitted to the car audio via the transmission element, then the car speaker can broadcast the voice signal, or the car audio can charge the Bluetooth earphone via the transmission element, then to achieve hands-free objects wherein the transmission element is able to transmit voice signal and power signal at the same time.