The Sony S-AIRPLAY AIR-SA20PK Wireless iPod Dock is an easy-to-use, plug-and-play system that lets you enjoy your iPod® music out loud throughout your home. Simply plug the two supplied AIR-SA15 receiver/speakers into a power outlet and the included S-AIR Dock for iPod transmits your stored music with CD-quality sound throughout your home. The Sony S-AIRPLAY AIR-SA20PK Wireless iPod Dock is even capable of transmitting two signals simultaneously so that one speaker can play your iPod music while the other plays an AM/FM radio station. The Sony S-AIRPLAY AIR-SA20PK Wireless iPod Dock is compatible with most iPod models. Additionally, each speaker includes controls for volume and the audio source, an LCD display that lets you view track info, and a convenient clock and alarm.