Wireless transmitter for car audio Introduction： Thank you for purchasing our car audio wirless transmitter! The product is low distortion FM modulator, you can modulator any audio in your portable device such as Mp3 player, MD player, CD player and VCD player ect to a FM signal, and your FM receiver in your car can receive the FM signal and play it, this mean you can enjoy any music in your portablc device freely even you are driving now. Take it home immediately! HOW to use: 1 Plug the unit into cigarette lighter in your car. 2 Connect input connector in the unit to your portable device output jack and adjust the portable device output to proper level by volume control. 3 Turn the frequency or FM receiver in your car to the frequency labeled on the unit and you can enjoy fantastic music in your portable device now. Product Specifications: Operating Range ≥30m Operating Current 45mA+10mA Channel Isolation Ratio ≥72db Operating Frequency Labeled on the unit Frequeney Range 20-15000Hz Output current 100mA(max)