Fangrui Product Details Easily Connect The 3.5 Headphone Jack To Digital Audio/amplifier Double Noise Reduction, No Current Sound, Stronger Anti-interference Built-in Professional Audio Op-amp Chip To Ensure High-quality Sound Quality Portation Optical Fiber And Co-frequency Audio Shaft Output At The Same Time No Driver Required, Plug And Play Converts Rca Or Aux Analog Stereo Audio Signal To Digital Coaxial Audio And Toslink Spdif Optical Digital Audio Simultaneously. Note: Its Not A Digital To Analog Audio Converter. Color:black Grey Material:metal Package Contents: 1 X Converter 1 X Optical Cable 1 X Usb Cable Only The Above Package Content, Other Products Are Not Included. Note: Light Shooting 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.