Excelvan F27 Fm Wireless Radio Adapter Transmitter with Automobile Car Charger for All Smartphone and Mp3 Mp4 Player, Black
Probably the best one i have had, it is worth the price.It also has a USB that you can charge your phone with. Make sure to put it on a frequency in which there is no other station and you shouldn't have any problems. Pretty clear and cheap solution to you wanting to hear your music or whatever in your vehicle.