Professional multichannel wireless presenter set from WMS 470 series that features a pilot tone transmission to prevent unwanted noise, ideal conference, medium theatre and houses of worship applications. It includes a SR470 receiver, a PT470 body-pack transmitter, a C555 L head-worn microphone, a CK99 L lavalier microphone, a rack mount kit, universal power supply, an AA size battery, two antennas and a belt clip. The SR470 analogue space diversity professional wireless receiver comes in a rugged half-rack metal housing. The enhanced Auto Setup with channel preview, Environment Scan and Rehearsal mode allows a very quick and easy system setup. The programmable backlight changes colour to warn the user of critical operating conditions e.g. transmitter low battery information, audio peaks, or low radio signal strength. The PT470 analogue professional wireless body-pack transmitter in a small, rugged housing provides the pilot tone transmission, which prevents unexpected start-up noise, continuously sending transmitter data, including low battery information, to the receiver. An enhanced battery management allows up to 14 hours of operation on a single AA-size battery. With the integrated charging contacts, a standard NiMH rechargeable battery can be charged inside the transmitter. Its professional mini XLR audio connector makes it compatible with a broad range of lavalieres and headsets. The C555 L high-performance head-worn condenser microphone is ideal for hands-free applications, including presentations or onstage performances. It rests securely and comfortably on the head, and can be attached to the left or right side of the behind-the-neck headband as desired. A transducer shock mount reduces handling noise to a minimum. The moisture shield ensures a high degree of humidity protection for the microphone. The microphone provides a three-pin mini XLR connector. The CK99 L is a condenser lavalier microphone with cardioid polar pattern and 125-degree pickup angle. It provides a natural sound, with a slight rise above 10kHz for added clarity, perfect for applications in houses of worship, lectures and theatres. Thanks to its small housing and the included durable metal clip, it can be inconspicuously and securely mounted on jackets and costumes. The microphone provides a professional three-pin mini XLR connector that fits the body pack transmitters of all AKG wireless microphone systems.