Features: 1) Standard USB 2.0 interface 2) Play MP3 wire-free from Your USB Driver or Movable Hard Disk through Car Stereo 3) Audio input Jack for use with MP3, CD, DVD and MD players 4) 16 Preset Channels, 8 channels within 87.7 - 88.9MHz, 8 channels within 106.9 -108.1MHz 5) Last frequency and last song memory function 6) Red LED displays the working frequency 7) Six position flexible Joint for ease of use 8) Functional keys: PLAY/PAUSE, PREV/V/NEXT/V/and CH 9) Car cigar socket power supply wire-free (12V DC power) Technical specifications: 1) USB Interface: USB1.1 2) FM frequency range: 87.7~88.9MHz 3) SNR: 90dB 4) Output frequency: 20Hz - 20kHz 5) Supported file: MP3 6) Audio source: USB flash disk 7) Bit rate: 32Kbps - 256Kbps Notice 1) Operation voltage for the device is +12V. Higher or lower voltage could cause the device damaged or failed 2) For the sake of safety, please insert the USB flash disk before you plug the device into the car cigar socket 3) The device supports most USB flash disks except a few 4) The device supports MP3 file only 5) The device locks at the default channel 87.7MHz when it is powered on 6) Frequency of the car FM tuner should be the same as that of the car MP3 player 7) You\'\'d better not pull out the USB flash disk during playback. Stop the playback first 8) The earphone jack is only for LINE-IN function, not for listening music 9) The progress may be slow when the USB flash disk stores too many MP3 files