mp3 player car adapter

fm transmitter
Car fm transmitter
mp3 player car adapter

1) Plug car Mp3 transmitter into car lighter till the red LED indicator lights on
2) Plug audio frequency connector of car Mp3 transmitter into earphone jack of your MP3 or other audio sources 
3) Open your MP3 and tune the volume up rather range (about 2/3 of the whole volume range)
4) Set up FM channel as same as frequency of car MP3 transmitter, then car radio will search music station automatically
5) Turn the volume of car radio till satisfaction
6) 5 Frequency(106.7MHz-107.9Mhz) can adjust.
7) supply by car or alkaline battery.