Introduced in 1991, this model remains one of our best selling headsets and is our least expensive headset. Proven reliability and affordability has made it the choice of fleets and flight schools around the world. A “no frills” dependable performer. You can accessorize this headset to make it even more comfortable by adding a pillow-top head pad or confor foam or silicone gel ear seals. NRR 24 dB