The Technical Pro H2502URIBT is a combined Amplifier / Pre-amplifier / Tuner built with the same quality design you would expect from Technical Pro"s superior technology. Pushing out 2500 watts of peak power and hosting a 7.2 channel up conversion this unit will exceed all expectations. The 7.2 channel up conversion will allow you to connect your iPod or USB sound device (normally outputting only two channels) and output to seven speakers and two powered subwoofers. Multiple source inputs allow front panel connections for a USB flash drive, SD Card, a MP3 / iPod music player and wireless connection to any Bluetooth enabled device - in addition to a two channel and 5.1 channel RCA input on the back. The SD Card and USB flash drive inputs on the front panel of the H2502URIBT, allow you to connect your portable audio directly to the amplifier. The USB flash drive and SD Card can handle a maximum size of 32 GB & play your .mp3, .wav & .wma files from your USB flash drive or SD Card through this receiver. Playback features for the USB flash drive / SD Card inputs include play, repeat and random playback. The USB flash drive and SD Card inputs can also capable of recording onto a USB flash drive or SD Card with empty space on it. That means you can record from the microphones, tuner or either RCA inputs directly onto the USB flash drive / SD Card. The H2502URIBT"s Bluetooth compatibility allows for wireless connection to any A2DP stereo Bluetooth device. That means