Products overview:

• Three-in-one function, have USB socket outlets, SD card and audio line socket
• LCD display, clear
• Support MP3 formats
• LCD display, can show the title matrix, the frequency of detailed information
• 15 launch frequency
• Frequency and memory function in song
• Can transmit frequency broadcast storage
• Rotating shaft joint design, Convenient use 
• It can directly read the root of the disc, SD/MMC card
• Can bend up and down.

Using methods:

• Uou can play MP3 files directly form a USB flash drive or SD memory card,and it will transmite the sound to FM radio from 87.7MHz -107.9MHz, you can use your car FM Radio music system to listen the music. No MP3 player needed if you load your MP3 files to a flash drive or a SD card!
• It is a very compact design, comes with a remote, no extra cords or batteries needed.Works with ALL iPods (Including iPhone) AND MP3 Players! If your device accepts standard headphones (3.5mm), than it will work with this transmitter.