Shure BLX1288/MX53 Combo K3E, Dual UHF Wireless System, With 1x BLX1 bodypack transmitter, 1x SM58 handheld transmitter and 1x MX153 ear-set microphone, Up to 6 systems in parallel, Pilot tone, Microprocessor-controlled internal antenna diversity, QuickScan function for open frequency detection, Condenser MX153 microphone capsule, 20 - 20,000 Hz, omni, Dynamic SM58 handheld transmitter, 50 - 15,000 Hz, cardioid, Plastic receiver, Integrated antennas, XLR and jack outputs, Audio status LED, Frequency range: K3E 606 - 630 MHz