[ Digital to Analog Converter Cable]: This optical to +3.5mm AUX digital to analog audio converter cable is a combination of digital to analog converter with optical and cable, you don't need to buy optical and cable separately. It converts optical/SPDIF/TOSLINK/interface optical digital audio signals to (L/R) and 3.5mmAUX output analog audio signals (Note: the optical end is the signal input, not reversible!) . [Applicable Devices] Suitable for PCM format (stereo, dual-channel) audio fiber optic interfaces, such as the connection between most smart /for /for /DVD/Internet Set-Top Boxes and audio signal amplifiers/active speakers/headphones on the market. (Note: It is an audio converter cable and cannot output video signal). [Easy Connection] You only need to connect one end of the audio cable to the Optical/SPDIF/TOSLINK audio output port of the above applicable devices (please note the direction of the optical plug and the optical jack), and the other end to the (L/R), 3.5mm AUX audio input port of the active speakers, amplifiers, and headphones, to provide you with a superior stereo experience! [HD Sound Quality] Optical fiber transmission signal is not subject to external RF and electromagnetic interference. Audio cable is made of elastic material, not hard in winter, to pulling and not tangled. Colour:black Material:PVC+metal size: 3 Meter Warm tips: 1.The audio cable must be connected to the USB power supply to work! 2. The connected speakers must be active speakers! 3. (L/R) and 3.5mm output terminals cannot be connected to the device at the same time, or the speakers have no sound. Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * Digital to Analog Audio Conversion Cable Only the above package content, other products are not included. Note: Light reflection 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.