Technical Pro Professional Receiver with USB & SD Card Inputs 800 watts peak power (RMS rating through 8 ohms is about 50 watts per channel) FM manual tuner Inputs - RCA (2 audio sources), USB, SD Card, MP3 Outputs - Banana binding post (2 speakers), push Button (surround speakers), RCA (Line Out), 2 Mono RCA (Subwoofer Out) USB & SD Card maximum size - 32GB