Specifications: This DAC converter converts digital audio signals to analog L/R audio and can be connected to external devices such as amplifiers by a standard RCA-type jack. You can also Choose 3.5mm headphone jack output to connect high-fidelity headphones. With volume knob, you can adjust the volume of RCA L/R + 3.5mm jack audio output, convenient to use. It's ideal for home or professional audio switching. Plug and play, no need to install extra programs. Item Name: Audio Converter Material: Aluminium Input Interface: for Tos-link, Coaxial Output Interface: R/L RCA, for Tos-link, Coaxial, 3.5mm Signal Sampling Rate: 32-192KHz Bit Rate: 16-24bit Output Impedance: 16-300Ohm Working Voltage: 5V Features: Volume Adjustment, Plug and Play, Digital to Analog Notes: This converter supports digital to analog but ont supports analog to digital. Please set the audio output to the PCM/LPCM format. This converter doesn't support 5.1 channel such as for D-olby and DTS. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Package Includes: 1 x Audio Converter 1 x USB Power Cable 1 x Optical Cable 1 x User Manual