The Audioengine D2 24-bit Wireless Digital-to-Analog Converter lets you stream wireless HD audio from your computer or other device with optical outputs, to any music system that's independent of your WiFi network. The D2 Sender features USB and optical SPDIF inputs. The sender takes the signal and can send it over 100 ft, wirelessly, to the D2 Receiver. The receiver features both digital optical SPDIF and analog RCA stereo outputs that you can hook up to your music system for streaming HD audio wirelessly. Plus, the high-performance digital-to-analog converter (DAC) ensures that your music is crystal clear and unaffected by the transmission from computer or other device to music system. The system also affords the isolation benefits of wireless. Setup is fast and simple, with no software to install and free from the frustration of trying to connect to your home WiFi network.