Blue Wireless FM Transmitter Modulator USB SD MMC LCD Remote Car Kit MP3 Player USB2.0 port, high speed. LCD screen (128*64). Built-in memory supported: 512MB / 1GB / 2GB / 4GB / 8GB (memory card not included). 3.5mm jacket audio input, support line-out. Voltage: DC12V-24V. Files supported: MP3/WMA.