Technical Pro Digital Hybrid Amplifier, Preamp Tuner, USB, Bluetooth, FM Radio, IPod/IPhone Compatible, Recorder, Removable Ears, Wireless Remote 3500 watts peak power, Inputs: RCA ( 2 audio sources), USB, SD Card, MP3 (3.5mm), Outputs: Banana blinding post (4 speakers), push button (surround sound speakers), RCA (record line, preamp, 2 mono to subwoofer) , Headphone (3.5mm), USB & SD Card maximum size: 32GB Plays .mp3, .wav, .wma files from USB drives and SD Cards Plays .mp3, .wav, .wma files from USB drives and SD Cards iPod compatible , USB input allows for direct connection with an iPod , Records .wav files onto USB Flash Drive or SD Card from Tuner & RCA inputs , 128 kbps / 44.1 KHz sampling rate on .wav file recordings Track title, track number & elapsed time will display for USB / SD Card inputs , Bluetooth compatibility allows for wireless connection to any A2DP stereo Bluetooth device , Features Bluetooth v2.0 with EDR Bluetooth (2.4 GHz) technology Bluetooth Range: 30 Feet , Repeat / Random playback on USB / SD Card inputs 7.2 Channel up conversion , AM/FM digital tuner Bass, treble and balance controls , Dual 1/4'' mic inputs with volume, echo, bass and treble controls