Shure BLX14R/P31 T11, UHF Wireless System, PG Headset Series, BLX1 Bodypack, PGA31 Headset microphone, Up to 3 systems simultaneously, Pilot tone, Microprocessor-controlled internal antenna diversity, QuickScan frequency selection to locate open frequencies, Condenser headset PGA31, Frequency range: 60 - 20,000 Hz, Characteristic: Cardioid, 9.5"" / 1 U metal receiver, Detachable BNC antennas, XLR- and jack outputs, Audio status LED, Frequency range: T11 (863 - 865 MHz), Incl. Rack mount kit and connector plate to connect two receivers to one 19"" unit