Model Number : PL-CA07 Product Name: Car FM Transmitter Model Number: PL-CA07 Place of Origin: China Features: 1) Wireless FM transmitter lets you enjoy your favorite MP3 music in your car, Truck, boat or RV 2) Insert into your vehicle\'\'s 12V cigarette lighter socket 3) Built-in FM stereo transmitter module to broadcast the MP3 music to Preselected radio channels 4) Adjustable frequency: Choose the least interfered frequency between 87.7 and 88.9MHz on your car stereo 5) USB host control interface to read most kinds of USB Flash drives Specifications: 1) Full plug and play 2) Supports most brands of USB 1.1 and 2.0 Flash drives (pen drives) 3) Easy one-touch operation 4) Play all MP3 music format files 5) Multiple FM channel selection 6) DC 12V operating with car lighter and power outlet 7) Power in:12V DC Instructions: 1) Plug into the cigarette lighter outlet (12V), when you are out; the light Indicator should be blinking every 3 seconds 2) Plug pen drive (Flash drive) to the player which contains music files (MP3 Format files only) 3) Turn the car radio on and set both radio and the MP3 player to FM 87.7MHz And press play on the player to start 4) Adjust the channel if there is a signal interference; choose any un-interfered Channel from 87.7 to 88.9MHz 5) To pause the music, press play again 6) Press on next or prev going to next/previous song System requirements: 1) A PC with a USB port is only needed to load and/or delete songs in MP3 Format on the USB Flash drive 2) A compatible USB Flash drive up to 1GB; this MP-308 unit is compatible with Most of the USB Flash drives on the market; however, it will have Incompatibility issue with most of Sandisk Flash drives (using Genesys Controller) and Sony USB Flash drives (using Prolific controller).