Samson Audio SW77SCH5U2 Concert 77 Wireless Mic System w/ Headset - Channel 2 The Samson HS5 headset microphone features a hyper-cardioid pattern for eliminating feedback and off-axis noise. Compliant molding reduces handling noise and the boom bends smoothly, rated to withstand over one thousand 90 degree bends without degrading True Diversity UHF Wireless System with PLL Frequency Control - twin antennas and receiver circuits that compete for the strongest possible reception Multi-segment Audio level, RF level and A/B Antenna Operation LED meters Squelch control eliminates carrier signal noise and RF interference Tuned molded antennas for accurate reception