SainSonic Multi-Function Car MP3 Player (Blue Display) Car MP3 WMA Player/ FM transmitter, compact and fashionable design. Support SD/MMC memory card(Max 8GB) and USB flash drive (not included) Charge your USB device through the USB port (Charging cable is not included) Volume rotating button and power switch in one button. 7 built-in EQ: Normal, ROCK, POP, CLASSIC, Country, JAZZ, DBB.