Shure BLX288/SM58 Combo K3E, Dual UHF Wireless-System, 2 Sm58 handheld transmitters, SM vocal series, Up to 6 systems simultaneously, Pilot tone, Microprocessor-controlled antenna diversity, Quick-Scan function for free frequencies detection, Dynamic SM58 microphone capsule, Frequency range: 50 - 15,000 Hz, Directional characteristic: Cardioid, Plastic receiver, Integrated antennas, XLR- and jack outputs, Audio status-leds, Frequency range: K3E (606-630 MHz)