The SM31FH Fitness Headset Condenser Microphone from Shure is a cardioid condenser headset microphone designed to be used by fitness and aerobics instructors. It has integrated moisture-repelling hydrophobic fabric that helps protect the microphone capsule from sweat and humidity. A windscreen is included.

Features:
Wearable wireframe headset designed for a secure, comfortable fit made for fitness and aerobics instructors
Integrated moisture-repelling hydrophobic fabric protects the microphone element from harmful corrosion for use in humid environments
Flexible gooseneck design provides discrete adjustment options to optimize placement for greatest isolation
Compatible with Shure wireless bodypack systems for direct replacement of TA4F-connected microphones
Lightweight and low-profile form factors help avoid fatigue during high-impact use
Tailored frequency response refined for crisp and clear vocal reproduction

Frequency Range 45 Hz to 20 kHz
Maximum SPL 145 dB SPL (1 kHz, 1-Kilohm Load)
Impedance 600 Ohms at 1 kHz
Output Level -50 dBV/Pa
Dynamic Range 117 dB (1 kHz, 1-Kilohm Load)
Signal-to-Noise Ratio 66 dB (1 kHz)
Equivalent Noise Level 28 dB A-Weighted (Typical)

Connectivity
Cable Length 45" / 1.1 m

Power
Operating Voltage 5 to 10 V

Physical
Color Black
Mounting Over-Ear (Double/Neckband)
Weight 2.11 oz / 60 g

Shure Professional SM31FH-TQG (Shure SM31FH)