Features: brand new and high quality Decode DTS/AC-3 source digital audio signal into analog 5.1 channel audio signal. The analog stereo (R/L) signal is converted into an analog 5.1 channel audio signal through the audio processing chip. 2 SPDIF optical fiber inputs, 1 coaxial coaxial input, 1 stereo stereo input, more complete multi-channel digital audio output makes switching more convenient. RCA output interface, easily docking and docking power amplifier. One-key multi-channel switching, convenient and quick, simultaneous stereo and 5.1 channel switching. Specifications: Sex noise ratio: 120db Resolution: 80db (1KHZ) Response frequency: 20Hz ~ 20KHz +/- 0.5db Analog output level: 2.2V Material: ABS+Metal Color: Black Product Dimension: approx. 105x75x25mm/4.13x2.95x0.98inches Package Type: Single Host and Usb, Host and Usb and Optical Fiber Net Weight: 260g/0.57lbs Package Includes: 1Set AC3 Decoder Board Screen Module with Power Amplifier note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.