Feature:1. MAIN FUNCTION: 5.1 sound decoder decodes sound from HD multimedia interface, optical, coaxial, PC USB, Bluetooth, and USB flash drive playback into 5.1 independent channels of output (6 channels), which is then amplified by amplifier or active speakers for volume output.2. MULTI INTPUT: Sound decoder supports 1 channel HD multimedia interface input, 1 channel ARC input, 1 channel digital coaxial input, 1 channel digital optical input, 1 channel digital EPC USB input, 1 channel Bluetooth 5.0 input, 1 channel USB2.0 interface input, which can be freely switched between different signal sources by button or remote control.3. SAMPLING FREQUENCY: Sampling frequency is 24bit 192KHz, which can achieve accurate bit by bit sound reproduction. Enjoy decoded sound output with directional sound. After decoding, all sound details are retained in the original HD feed.4. MULTI FORMAT SUPPORT: Decoder supports HD multimedia interface version 2.0b (resolution support up to 4K and 60hz) compatible with HD multimedia interface version 1.4. Support HDCP version 2.3, compatible with HDCP version 2.2, HDCP version 1.4, support 3D and HDR, support DTS, DTS ES, DTS WAV, AC3, FLAC, APE, HDCD, AAC, WMV, MP3, M4A and other digital sound formats and decoding.5. SOUND OUTPUT MODE: Digital sound decoder automatically detects and identifies the input digital sound signal format, if the source is 5.1CH, then hard decode (real 5.1), if the source is 2.0 or 2.1CH, then soft decode (virtual 5.1). Support 2.0CH and 5.1CH two channel output mode, 2.0CH mode that is FL FR output.Specification:Item Type: HD Multimedia Interface Sound DecoderModel: RH 688XMaterial: MetalHD Multimedia Interface Support Version: HD Multimedia Interface 2.0b, HDCP 2.3HD Multimedia Interface Resolution Support: 4Kx2K 1080p 1080i 720p 576p 576i 480p 480i At 24 50 60fsHD Multimedia Interface Maximum Data Rate: 6GbpsSupport Sound Formats: DTS, DTS ES, AC3, FLAC, APE, WAV, HDCD, AAC, WMV, MP3, M4A, Etc.Sampling Rate Sampling Frequency: 24bit 192KHz5.1 Analog Output: ≥ 2V RMS (1KHz At 0dB)Signal To Noise Ratio: ≥90dBDistortion: ≤0.03%Frequency Response: 20Hz to 20KHzBluetooth Reception Distance: ≤15m/49.2ftRemote Control Battery: 2 x AAA Alkaline Batteries (Not Included).Package List:1 x Sound Decoder1 x Remote Control1 x Optical Sound Cable1 x Antenna 1 x Supply Adapter1 x Coaxial Sound Cable1 x USB Cable1 x Instruction ManualNote:Power amplifier or active speaker must have 5.1 input port to achieve seamless connection with decoder