Usually 3-5 Days. The WMS 400 PT 97 features an SR 400 UHF Diversity Receiver, a PT 400 Compact UHF Bodypack Transmitter, and a CK 97-C Cardoid Lavalier Microphone for great sound and high gain before feedback. This system is frequency agile 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!