Car FM transmitter Model:CS-FM01 Body Long: 10.5cm, 5cm remain long after plugging into cigarette lighter Wire Long: 120cm Features: 1.This incredible new product is adopted with 3D sound coding technology, which maintains the Hi-Fi effects of MP3,MD, CD and TV. 2. It has been developed from frequency phase lock loop ethnology, which ensures stable frequency radiation while functioning at a distance of up to 30 meters with no dead areas. It operates through your automobile audio sounding equipment so that you can still enjoy Hi-Fi music. 3.Car audio wireless transmitter with four channel Product Specifications: 1. Operating Distance: Up to 30 meters. 2. Channel Isolation Ratio: ~{!]~}72db 3. Frequency Range: 20-1500Hz 4. Working Current: 45mA~{!@~}10mA 5. Operating Frequency: Labeled on the unit 6. Output Current: 100 mA max (According to different model) 7. Preset frequency station: 106.9 107.1 107.5 106.7 87.9 88.1 88.5 88.7 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(0.1 up and down) labeled on the unit and you can enjoy fantastic music in your portable device now