This Digital to Analog Audio Converter is designed for either home audio switching. Free Optical Audio Cable. It converts Coaxial or digital audio signals to analog stereo L/R audio and available for connection to an external device such as an amplifier via standard style jacks. Compact size, Easy to install and simple to operate. Input Audio: Coaxial o r Toslink digital audio Output Audio: Analog L/R stereo audio Input audio connector: Toslink, 1x (Coaxial) Output audio connector: 2x (R/L) Sampling rate: 32, 44.1, 48 and 96 KHz Colour:black Material:plastic Size:about 64 x 40 x 25mm Package Contents: 2 x Digital to Audio Converter 2 x USB cable 2 x Optical fiber 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.