The AVL645CD is a professional dual earhook headset microphone featuring a back electret condenser element with cardioid polar pattern. Designed for versatility in professional applications, it offers a frequency response of 30Hz to 18,000Hz and sensitivity of -65dB ± 3dB (0dB=1V/μbar at 1KHz). The microphone features a flexible and adjustable boom, detachable interchangeable cable for universal compatibility, and is compatible with various wireless body pack transmitters. With optional connector configurations including Mini XLR variants and 3.5mm plugs, it provides flexibility for different audio systems while maintaining impedance of 1,000Ω ± 30% at 1KHz.