VR3-VRCD500/USB/MP3 /CD/SD/WMA/Radio Car Stereo-Brand New!! A SD slot for use with SD cards USB Port For Use with Flash Memory Drive Compatible with MP3, WMA and CD/CD-R/CD-RW Play any MP3 Player or I-Pod Through it via USB Input!!! 180 Watts Total Maximum Power (4x45 Watts)  4 X 21 Watts RMS Graphic Equalizer* Stereo/AUX Input  30 Preset Stations