Acesonic DKR-510 320-Watt HDMI 5.1 Surround Sound Receiver & Multi-Format Player 1080p-Compatible HDMI digital video switching (3 in, 1 out) 1 Built-In Multi-Formats, All-Reigions DVD/CD+G/VCD/CD Player World's First Bluetooth 2.0 A2DP Stereo Input Amplifier, 'Bypass Channel Mode' switch off all unused circuitry for the cleanest possible sound 2 Channels or 5.1 Channels mode switching - perfect for karaoke or home theater setting