1、This DAC converter converts coaxial or for Toslink digital audio signals to analog left/right audio and can be connected to an external device, such as an amplifier, through a standard for RCA type jack, with the option of a 5mm/0.1in headphone jack for output, high fidelity headphones, ideal for home or professional audio switching. 2、The bi‑directional switch is designed to be more powerful than the DAC converter, supporting not only digital‑to‑analog but also digital‑to‑analog (for Toslink to Coaxial and for Toslink). Note that this converter supports digital‑to‑analog but not analog‑to‑digital. 3、There is hi‑fi amplifier chip, left/right and 5mm/0.1in output can drive 16 ~ 150OHm impedance headphone/sound. Support volume control, volume control knob, used to adjust the volume of the headphone port and for RCA port only, not for coaxial or for Toslink. 4、Using the volume knob, you can adjust the volume for RCA L/R + 5mm/0.1in jack audio output for easy use. 5、Easy to install, easy to operate. USB power cord, more environmentally , stable and convenient. 1x Audio Converter1x USB Connection Wire1x Signal Display Light1x Instruction Condition: 100% Brand NewItem Type: Digital to Analog Audio ConverterMaterial: Aluminum AlloyColour: As Pictures Shown Product Size: Coaxial Interface: Approx. 3.5mm/ 0.1inWeight: Approx. 225g/ 7.9ozInput Interface:Coaxial, for ToslinkOutput Interface: R/L for RCA, for Toslink, Coaxial, 3.5mm/ 0.1inSignal Sampling Rate: 32-192 KHzBit rate: 16-24 bitsOutput Impedance: 16-300 ohmsWorking Voltage: 5VNote:  1. There is a power switch on the volume knob, please turn on the power switch before using DAC 2. Please set the audio output to PCM/LPCM format 3. for Samsung TV, if the audio output is set to PCM/LPCM and there is no sound, turn on the TV external speaker (Menu-sound-speaker Settings -HESB/external speaker - open) 4. This converter does not support 5.1 channels, such as for Dolby and for DTS 5.  It is cannot be used for PS4 Pro and for PS4 Slim because they have no fiber output interface.