Lightweight battery-free active noise reduction aviation headset Sound quality At just 4 oz., the Airman 850 is the lightest ANR product in the marketplace. Wind noise and ambient noise is reduced by up to 12 decibels (dB) of. The headset also features a noise-cancelling electret microphone. Comfort & fit An adjustable headband gives the wearer two inches of up and down earphone adjustment per side, while gimbal mounting improves the headset's side-to-side comfort. The ear cups and cushions have been enlarged from previous models to enhance pilot comfort. Microphone The Airman 850 features a miniature, amplified, noise-cancelling electret microphone that provides superior 400Hz hum rejection. The flexible boom rotates 320 and can be worn on either side of the head. A replaceable windscreen is included to minimize popping, hissing, and breathing sounds when speaking. Controls The Airman 850 contains an On/Off switch to control ANR power and a Hi/Low switch for controlling receiver volume. Cordage & plugs The microphone cordage is protected inside the boom. A strain relief on the cord provides maximum durability. Shielded wire throughout the headset protects against RFI and EMI. FAA TSO approval The Airman 850 headset is approved for aircraft use under FAA TSO's C57a and C58a. Using the latest in ANR circuitry to target and reduce wind noise in jet cockpits, the Airman 850 provides up to 12 decibels (dB) of noise attenuation between 100 and 2000 Hz. At just four ounces, the headset is the lightest ANR product in the marketplace, and ear cups and cushions have been enlarged from previous models to enhance pilot comfort. Additional features include a set and forget volume control feature, noise-canceling electret microphone and fully flexible boom. The Airman 850 dramatically improves the clarity of communication and does not require batteries or panel power active noise reduction is powered by microphone bias. Telex Airman 750 and 850 headsets are used in more than 70 percent of commercial airframes. The Airman 850 is available for Boeing, Airbus and other airframes and does not require specialized intercom adapters.