Easy Installation Simply plug the device into a standard 12/24 V DC outlet for power supply, tune the car radio system to an unused station, set the transmitter to the same frequency, and start enjoying its convenient features. Audio Streaming This FM transmitter is able to play music files in the MP3 or WMA format on a USB flash drive, and can also stream music via a 3.5mm cable from an MP3 player, cell phone, tablet or any other device. The audio is wirelessly transmitted to the car speaker system via FM radio signals. You may switch soundtracks or adjust the volume with the press of a button on the transmitter or use the remote controller: an added level of convenience! Specifications: Car MP3 WMA Player/ FM transmitter, compact and fashional design. Listen to your favorite MP3 in your car with this multi-function car MP3 player 360 degree rotation Support SD/MMC memory card and USB flash drive (memory card not included) Charge your USB device through the USB port (Charging cable is not included) Volume rotating button and power switch in one botton. 7 built-in EQ: Normal, ROCK, POP, CLASSIC, Country, JAZZ, DBB