The AVL648 is a professional dual earhook headset microphone featuring a back electret condenser element with an omnidirectional polar pattern for uniform sound capture. It delivers reliable voice reproduction with a frequency response of 50Hz to 20,000Hz, sensitivity of -60dB ± 3dB (0dB=1V/μbar at 1KHz), and impedance of 1,500Ω (± 30% @ 1KHz). Operating on 1V to 10V DC, this lightweight model features an adjustable headset design that fits various head sizes and folds flat for storage. The Ø3.5 4 pole plug variant connects directly to compatible devices for professional speech applications in conferencing, theatre, and broadcasting environments.