You put a socket into the cigarette lighter. Since is even a USB input for charging another device. The other side has a gold-plated jack plug in 3.5 mm, which can be plugged into the device. Then you look at the radio frequency that you do not use and provides the transmitter to the same frequency, a radio station. And you can already his own music from the MP 3 or MP4 player or smart phone in the Stereo listening through the car speakers. That's a brilliant idea.
The transmitter itself is scarce 7 cm long, about 2 cm thick. It will turn red in operation. the cable has a total length of one meter. A Velcro goes into the cable, which allows you to secure the cable somewhere in the car.
