AUTOMOBILE HANDS-FREE DEVICE OF MOBILE PHONE

摘要

PURPOSE: A hands-free device for a car is provided to have a conversation via a car audio system without using a hand simultaneously with charging a battery when using a mobile phone while driving the car. CONSTITUTION: A hands-free device for a car comprises a cable(210), a microphone(220), a car audio(300), and a speaker(400). The cable(210) gets connected to a lower connector of a mobile phone when a user uses the mobile phone while driving the car. The microphone(220) converts a voice of the user into an electrical signal. The speaker(400) generates a voice signal transmitted via an antenna and the car audio(300) from the other side. An FM transmission(211) regulates a voltage, oscillates the voice signal, and transmits the voice signal to the car audio(300) via the antenna(232).