LD Systems U308 BPH, UHF wireless system, with bodypack transmitter and headset, radio frequency range 823 – 832 MHz and 863 – 865 MHz, 12 preset channels, up to 6 systems can operate simultaneously, RF power 10 mW, ASC infrared sync of transmitter and receiver, squelch by pilot tone, 10 hours transmitter runtime with 2 AA-batteries, receiver in rugged metal housing, optional rack mount kits (not included): items 452686 and 407645