ZR4

4 Source, 4 Zone Audio MultiZone Receiver Kit with AM/FM Tuner

Includes: MultiZone Receiver, Rack Mount Ears, Four IR Weather-Resistant Keypads, Hand-Held Learning Remote Control, Three Infrared MicroFlashers

ZR6

6 Source, 6 Zone Audio Multizone Receiver with built-IN AM/FM Tuner and iPod Integration

Includes rack mount ears, a R-8L hand-held learning remote control and an iPod connection cable.