Transmitting frequency: 88.0-108.0MHz 200channels Play MP3 Wire-Free from Your USB Driver or Movable Hard Disk through Car Stereo Audio Input Jack for Use with portable Players Last Frequency and Last Song Memory Function Red LED Displays the Working Frequency Six Position Flexible Joint for Ease of Use Functional keys: PLAY/PAUSE, PREV/V-,NEXT/V+ and CH. Car Cigar Socket Power Supply Wire-Free (12V/24V DC power) Remote function(option) Color: Black/White