Features: Support one Optical /,one Coaxial/Bluethooth-compatible5.0/ ARC-/USB 2.0/One PC-USB inputs. You can switch- different signal sources randomy by Button. Audio farmat support FLACAPE-DTS--AC3WAVHDCD-DSD-AAC-WMVMP3M4A etc. Support 5.1ch/2.0ch output mode selection,-FL/FR- active when 2.0ch output mode. Support volume adjustment and switch- between previous song and next song Support Button switch- input-source ,and turn on corresponding LED. Surpport hardware decoding (5.1 channel separation ) and software decoding(2.0ch to 5.1ch) Support USB player and Input-source selection power off memory function. Specifications: Item:DA615H DTS-Dolby 5.1 Audio Decoder Model: DA615H Voltage: 5V Input-interface: Optical /,one Coaxial/Bluethooth-compatible5.0/ ARC-/USB 2.0/One PC-USB Size:As pictures Power Supply:DC-5V/1A- Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1PC DA615H Audio Decoder 1PC DC-5V/1A- power adapter 1PC Digital optical fiber cable 3PCS 3.5mm to 2xRCA cable 1PC Bluetooth-compatible Anntena