Audioengine has introduced its new W2 Premium Wireless Adapter for iPod. The W2 is a two-piece system consisting of a Dock-connecting wireless transmitter and a USB-charging receiver offering 3.5mm audio output. The system uses a Wi-Fi-based, all-digital, PCM encoded stream sent over a closed network to ensure maximum audio quality and reduce interference. The system can also be expanded with extra receiver modules which the transmitter can “hop” between. Included with the system are the wireless transmitter and receiver, an USB AC power adapter for the receiver, mini-jack to RCA, and standard mini-jack audio cables. The Audioengine W2 Premium Wireless Adapter for iPod is compatible with the iPod classic, iPod touch, and second-, third-, and fourth-generation iPod nano, and is available now for $169.