[Digital Analog Converter]This DAC Converter Converts Coaxial or Toslink Digital Audio Signals to Analog L/R Audio and Can Be Connected to External Devices Such as Amplifiers via a Standard RCA-Type Jack, You Can Also Choose 3.5mm Headphone Jack Output, Connect High-Fidelity Headphones, It's perfect for Home or Audio Switching.[Bidirectional Switch]Bidirectional Switch Design Makes It More Than a DAC Converter, Not only Supports Digital to Analog, Also Supports Digital to Digital (Support Toslink to Coaxial and Coaxial to Toslink) PLEASE NOTE: This Converter Supports Digital to Analog BUT NOT Support Analog to Digital.[Supports Volume Adjustment]Built-in High-fidelity Amplifier Chips, L/R and 3.5mm Output Can Drive 16-150ohm Impedance Headphone/Sound. Supports Volume Control, Volume Control Knob Just for Adjusting the Volume of the Headphone Interface and RCA Interface, Not for Coaxial or Toslink.[Plug and Play] Comes with 4.0 OD Optical Cable, Coaxial Cable and Adapter, No Need to Install Extra Programs, Just Plug and Play(Note: This Converter Doesn't Support 5.1 Channel Such as Dolby and DTS; Please Set the Audio Output to PCM or LPCM Before Using; Pro and Slim Can't Use This Converter).[192KHz Sampling Rate Achieved]With Volume Knob, You Can Adjust the Volume of RCA L/R + 3.5mm Jack Audio Output, Convenient to Use (Note: CANNOT Control the Toslink or Coaxial Audio Output). It Actually Supports Sampling Rate at 32, 44.1, 48, 96 and 192 KHz, and 24-Bit S/PDIF Incoming Bit Stream on Left and Right Channels.Signal Sampling Rate:32-192 KHz,Bit Rate:16-24 BitOutput Impedance:16-300 ohmWorking Voltage:5VNote:1. There is a switch on the volume knob, please turn on the switch before using the DAC.2. Please set the Audio Output to the PCM/LPCM Format.3. For TV, if there is no sound even you set the audio output to the PCM/LPCM format, please turn ON the TV external speakers (Menus-Sounds- Speaker Setup- HESB/external speaker-ON)4. This converter doesn't Support 5.1 Channel Such As Dolby and DTS.5. Pro and Slim CANNOT use this converter as they haven't Optical fiber output interface.Material:PC+ metalColour:blackPackage Contents:1 * Digital to Analog R/L Audio Converter1 * DC USB Cable1 * Toslink cable1 * User manualOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.