This converter converts digital audio signals to analog L or R audio and can be connected to external devices such as amplifiers by a standard 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 L or R and 3.5mm jack audio output, convenient to use. It's perfect for home or professional audio switching. Plug and play, no need to install extra programs. Item Name: Audio Converter Input Interface: for Tos-link, Coaxial Output Interface: R or L , 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 supports analog to digital. Please set the audio output to the PCM or 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. Colour: black Material: metal and plastic Size: 81x71x25mm Package Contents: 1 x Audio Converter 1 x USB Power Cable 1 x Optical Cable Only 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.