... (peak value) 4. Analog 5.1,3D Surround Sound 5. Bluetooth Products Feature:Using digital Audio magnifying process, the small speaker ... and pleasant . With optical input and RCA input, You can connect it with TV, DVB, DVD, iPad, iPhone and other exterior ... YAMAHA Chip,Analog 5.1, 3D surround Sound,LCD display,Bluetooth is optional1x Optical input, 3x analog input, 1x power supply ...