... (peak value) 4. Analog 5.1,3D Surround Sound 5. Bluetooth Products Feature:Using digital Audio magnifying process, the small speaker ... as you like 2.4 G wireless Subwoofer, you can put anywhere you like in your room as you wish with ... YAMAHA Chip,Analog 5.1, 3D surround Sound,LCD display,Bluetooth is optional1x Optical input, 3x analog input, 1x power supply ...