The Audioengine W3R is designed to connect your audio components wirelessly. The W3R handles USB audio up to 16 bits/48KHz with no compression, as well as analog audio via a 3.5mm minijack. Think of the W3R as a wireless 16-bit USB DAC as well as a wireless audio link. The W3 consists of 2 parts, the "Sender" and "Receiver". The Sender transmits audio from your computer through USB audio or from any product with 3.5mm mini-jack or RCA audio outputs. The other side of W3, the Receiver, delivers audio to any product with mini-jack or RCA audio connectors. Power for the Sender and Receiver is provided from either a USB computer port, from the included power adapter, or from any other USB charger (such as an iPod charger, for example). Another power source is the Audioengine 5+ powered speakers, which are equipped with a USB power port on the rear panel. For use with Audioengine W3 Premium Wireless Audio Adapter Kit.