Telex Airman ANR 850 Headset ANR without batteries!Telex's latest headset combines the clarity of ANR, the comfort of a lightweight design, and the convenience of not having batteries to worry about. Weighing in at only 3.8 oz, the Airman ANR 850 uses mic bias to provide 12 db of active noise reduction. Perfect to reduce wind noise in jet cockpits. Features a "Set and Forget" volume control switch, electret microphone, and fully flexible boom. Three year warranty. Made in USA.