For an even more stable fit, the HC81 MD reference lightweight cardioid headworn microphone delivers unparalleled, precise sound. Featuring flexible ear-hooks and an adjustable boom, it’s incredibly easy for performers to customize the fit to their liking, without help from anyone else. When it comes to sound, its sensitive cardioid polar pattern picks up a wide range of frequencies—from bass to soprano—and provides flexibility in getting the best sound from the source. - Audio Frequency bandwidth: 400 Hz to 18 kHz - Sensitivity: 11 mV/Pa - Electrical Impedance: 1 kHz/5.000 Ohm - Length: 10 mm - Weight: 2 g - Colour: Beige.