Shure BLX188E/SM35 Combo K3E, Wireless System, SM Headset Series, Dual UHF Wireless System with 2x BLX1 bodypack transmitter and 2x SM35 condenser headset microphone with cardioid characteristic, Can operate up to 6 systems simultaneously, Pilot tone, Microprocessor-controlled antenna diversity, Quick scan feature for available frequency detection, Bodypack transmitter with a 4 pole connection TQG, Plastic receiver, Integrated antennas, XLR and jack outputs, Audio Status LEDs, Frequency range: K3E (606-630 MHz)