This is HD51R Digital Audio Decoder. The Digital Audio Decoder lets you control multimedia PCs with just one keyboard, monitor, mouse, microphone, and a set of speakers. The Digital Audio Decoderot only allows you to share your monitor, keyboard and mouse but you can also share microphone and speakers.It helps to increase your efficiency and productivity at home or in the office by reducing desktop clutter while keeping access to all of your programs and files spread across multiple computers.                                    Features            HD51R Digital Audio Decoders compact size design, easy portableSupports Microsoft Intellimouse, Logitech Net Mouse, etc.Convert DTS/AC3 suurce digital audio to analog to analog 5.1 audio or stereo audio putputNo software required-PC selection via push buttons, or hot keys                                                            Specifications            Signal to Noise    120db    <br>
Power Supply    DC 5V    <br>
Max Output Volt    2.2V    <br>
Dimensions    4.33" x3.15"x0.87" / 11 x8 x2.2cm (L x W x H)    <br>
Package Size    8.46" x5.9"x2.16" / 21.5 x15x5.5cm (L x W x H)    <br>
Color    Black    <br>
Weight    11.68 oz / 331 g    <br>
                                                            Package Includes            1 xHD51R Digital Audio Decoders1 x Optical Cable1 x User Manual1 x Power Adapter