1.This Digital to Analog Audio Converter is designed for either home or professional audio switching. 2.It converts Coaxial or Toslink digital audio signals to analog L/R audio. This Converter has many features that enable it to perform in a superior manner. 3.Converts Coaxial or Toslink digital audio signals to analog L/R audio. Supports sampling rate at 32, 44.1, 48 and 96 KHz. 4.24-bit S/PDIF incoming bit stream on left and right channels. Provides electromagnetic-noise-free transmission. Easy to install and simple to operate. The Reason of cancel the external power adapter and use USB powered. 5.Many devices (e.g. Computer TV DVD) USB ports output stable voltage and current, And filters some. Bad waves. So the ( Digital to Analog audio converter) works better, And decode more stable. In addition ,Use USB output power that is more environmentally friendly Product Name:Digital to Analog Audio Converter Adapter Product material:ABS&Metal Product color: black Product size: 6.5cmx4.1cmx2.5cm Product weight:190g Package Contents: 2 x Digital to Analog Audio Converter Adapter 2 x USB Power Cable 2 x 0.5m fiber 2x English manual 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.