The WMS470 professional analog wireless microphone system is the best choice for a cost-efficient, high-performance multichannel system. Up to 16 channels can be used simultaneously within the same frequency band. The pilot tone prevents the user from unexpected startup noise and it continuously sends transmitter data including low battery information to the receiver. A revolutionary power management allow up to 14 hours of operation with one AA-size lithium battery. If a NiMH rechargeable battery is used, it can be charged while remaining within the transmitter using the optional CU400.  OXYGEN MUSIC is proud to stock a wide range of quality AKG products, including the AKG WMS 470 Wireless Vocal Microphone Set.