4 in 1 Car MP3 With FM Modulator 1. Support Full Channel: 87.5~108MHz; 2. Build-in Mp3 Decoder 4 in 1 Car MP3 With FM Modulator ... MMC Card Directly;4. Rotary Joint Design, Convenient for You to Adjust the Devices Position;6. Voltage: 12V , Powered By Car Cigar Socket ... Audio Player (MP3, MP4, or CD Players, etc.)10. Full Function Super Slim Remote Controller Enclosed. 4 in 1 Car MP3 With FM Modulator