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AVL619-35 Professional Sweat-Proof Headset Microphone with 3.5 mm lock screw connector for Sennheiser etc
Sweet-Proof Aerobic Headset Microphone
Feature :
Element:Back Electret Condenser
Polar Patte: Unidirectional
Frequency: 100 Hz ~ 14,000Hz
Impedance: +/- 30% @ 1KHz
Operating Volt: 1~10V DC Battery
Sensitivity: -66 dB ± 3 dB ( 0 dB=1V/ microbar 1,000 Hz indicated by open circuit )
Connector: 3.5 mm lock screw stereo plug