In Stock. This version of the WMS 400 system features an SR 400 UHF Diversity Receiver, a PT 400 Compact UHF Bodypack Transmitter, and the famous C420 headset microphone for unparalleled vocal quality in a headset mic. This system is a frequency agile system with over 1100 possible channels, an auto set-up/frequency scan function, infrared setting of your transmitter, and a special high tech display that changes from green to red to alert you of any problems. It doesn't get any better than this at this price point!