Item Type: Audio Adapter / Converter Material: Aluminum Input Interface: For Toslink/Coaxial Output Interface: R / L for RCA/Toslink/Coaxial/3.5mm Signal Sampling Rate: 32-192 KHz Bit Rate: 16-24 Bits Output Impedance: 16-300 Ohms Working Voltage: 5V 1、Digital-to-Analog Converter: This DAC converter converts coaxial or for Toslink digital audio signals into analog left/right audio and can be connected to external devices such as amplifiers via standard for RCA-type jacks, as well as a 3.5mm headphone jack Output, connected to high-fidelity headphones, is ideal for home or professional audio switching. 2、Bidirectional switches are designed to be more than DAC-like converters, not only for digital-to-analog converters, but also for Toslink to Coaxial and Coaxial to for Toslink. 3、Support for volume adjustment: Built-in high-fidelity amplifier chip, left/right and 3.5mm output can drive 16-150ohm impedance headphones/sound. Support volume control, volume control knob, only used to adjust the volume of the headphone jack and for RCA interface, not for coaxial or for Toslink. 4、Plug and Play: Comes with 4.0 OD cable, coaxial cable and power adapter, no need to install additional programs, just plug and play. 5、Up to 192KHz sampling rate: With the volume knob, you can adjust the volume of the for RCA L / R + 3.5mm jack audio output for easy use. It actually supports sample rates of 32, 44.1, 48, 96, and 192 KHz, as well as 24-bit S/PDIF incoming bitstreams on the left and right channels. 1 x Converter 1 x Cable 1 x USB Cable 1 x Instruction Manual