Sony STRDH550 5.2 Channel 4K AV Receiver 5.2 Ch, 725W A/V Receiver (145 W x 7 at 6 ohms).Input and output terminals HDMI Video In/Out (4/1);Composite Video Input (2);Composite Monitor Out (1);Opt Audio Input (2);Coax. Audio Input (1);Analogue Audio Input (4);Headphone Output;USB (1 Front:iPhone/WM);MHL (1 Rear) Enhanced use via On Screen Display and streamlined remote. Immersive, ambient audio with HD Digital Cinema Sound Supports high-res file playback via USB Flexible HDMI connectivity with 4 inputs and 1 output Supports 4K pass-through,HDMI Audio Return Channel for playback of TV audio5