Features: Enjoy stunning 5.1channel with the UD851B DTS DolbyAC3 Decoders,perfect for audiophiles and home theater enthusiasts Adopt quality metal, this decoders is durable, ensuring long lasting Fit for anyone who wants to improve their experience, whether it be for movies, music, or gaming. Use it to your existing sound, or integrate it into a new setup for immersive, cinemas-quality sound in the comfort of your own home. Support 5.1ch/2.0ch output modes,active when 2.0ch output modes. power-off memory function, automatically switching to the last used signal channel, USB player memory before power-off. Specifications: Material:Metal Users can upgraded firmware via Disk when manufacturers have updated. The use of DC12V1A external power adapter power supply, wide voltages can use DC7-24V power supply. Support Button to turn the Volume and select songs Support individual volume adjustment via remote. Support 5.1ch/2.0ch output modes, active when 2.0ch output modes. Support Button switching input source,turn on corresponding LED. Note: Please allow 1-2cm errors due to manual measurement,please make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1xDecoders Machine 1xRemote Control 1xDC12V1A power adapter 1xDigital optical fiber cable 1xWireless Antenna 1xUser Manual