The present invention provides a modular cellular phone/vehicle stereo interface cable operable to support voice communication when connected to a cellular device and a unidirectional microphone arranged within the cable while wirelessly transfer the incoming voice signal of a remote caller to a vehicle stereo system to provide a hands and ear free communication. Due to the electromagnetic radiation hazard of cellular devices to the brain and other internal organs of the human body; it is required to keep the device away from the users. Wireless communication to the vehicle stereo is achieved with the use of a radio frequency modulator (radio transmitter) and this type of communication can be establish with any vehicle stereo system but not limited to. Additionally a direct connection also can be establish with some vehicle stereo systems that includes a standard 3.5 mm audio input female socket for the purpose of input music from other electronic devices, this audio input connector is usually located in the glove box or in the center console of the vehicle, additionally some new stereo systems provides an audio input female connector located on the face plate of the stereo system. with the use of the cellular phone/vehicle stereo interface cable a hands and ear free bi-directional communication is established.