The AVL619 Mini 4 pin XLR is a sweat-proof headset microphone designed for active use scenarios requiring hands-free operation. Featuring a back electret condenser element with unidirectional polar pattern, it delivers reliable voice capture across 100-14,000 Hz frequency range. With sensitivity of -66dB ±3 dB (0dB=1μbar @1kHz) and impedance of 600Ω ±30% (@1kHz), this microphone operates on 1-10V DC power. The Mini 4 pin XLR variant provides secure connectivity for wireless systems, making it suitable for demanding vocal applications where durability and consistent performance are essential during extended active use.