This product adopts LINUX operating system. For best performance, it takes about 16 seconds to self-test and optimize the operating system after electrify. This audio decoder can convert optical signal, coaxial signal (including LPCM) and analog 2 channel audio signal to 5.1/2.1 channel audio signal output, supporting decode Dolby AC-3/DTS audio into 5.1 analog audio. It is widely used in families, schools, squares, concert halls, cinemas and other public places to enjoy the shock effect of DTS or Dolby. Features: * Adopt high-performance LINUX operating system and audio decoder chip; support DTS/AC-3. * One-key switch for 5.1 or 2.1 channel output. 2 SPDIF Optical Input, 1 Coaxial Input, 1 Stereo Input. * AUX Input Port: Connect to any group of LPCM stereo signals (such as computer audio, MP3/MP4 player audio). * Automatically detect AC-3 DTS LPCM digital audio signal. * High compatibility: Support network player, HDTV, Blu-ray DVD, DVD, for PS3, for Xbox 360, DM500S, DM800HD, etc. Offers Much More Convenience: * Multiple channels, one-key switch. Fast and convenient. * Adopt RCA port output, convenient and efficient to use. * Small Size and Metal case, anti-interference. Specifications: Port: Optical port*2Coaxial port*1earphone jack*1, RCA*3 Support audio format: MP3, AC3DTS, WAVWMA, AAC, FLACAPEOGGM4AM3U8 Signal Noise Ratio: 120db Stereo Isolation: 80db1KHZ Channel Unbalance: 0db Sampling Rate: 32-192 KHz Bit Rate: 16-24 Bit Response Frequency: 20Hz-20KHz +/-0.7db THD: 20Hz-20KHz 0.25-0.065% THD+N: 1KHz 0.15% Analog Output level: 2.2V Analog Input level: 1V(3db) Max Power Current: 400mA Power Adapter: Input 100V-240V (50-60Hz); Output 5V/1A Working Temperature/Humidity: 0-70/10%-80%RH (non-condensing) Storage Temperature/Humidity: -10-80/ 5% -90% RH (non-condensing) Color: Black Main Item Size: 10.9 * 9.9 * 2.6cm / 4.29 * 3.89 * 1.02in Main Item Weight: 144g / 5.07oz Package Size: 18.0 * 14.3 * 5.0cm / 7.08 * 5.62 * 1.96in Package Weight: 288g / 10.14oz Package List: 1 * Audio Decoder 1 * 5V 1A Power Adapter 1 * Fiber-optic Cable 1 * English / Chinese User Manual