Specifications:
1) Operating distance: up to 30 meters
2) Channel isolation ratio: db
3) Frequency range: 20-1500Hz
4) Working current: 45mA ± 10mA
5) Operating rrequency: labeled on the unit
6) Output current: 100 mA max (according to different model)
7) Preset frequency station: 87.7, 87.9, 88.1, 88.3, 88.5, 88.7, 88.9

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) Select one of the 7 FM Modulator presets that a local radio station is not
broadcasting on (87.7, 87.9, 88.1, 88.5, 88.7, 88.9MHz)
4) Tune your car stereo to the same FM frequency as the FM modulator
5) Press the play button on the FM modulator and you can enjoy fantastic music
in your portable device now