TELEX HEADSET/AIR 3500, PNR 24 db, stereo, mono switch, 3 year warranty
300400-000 Full Cushion Headset -- FAA TSO C57a & C58a.
At 13.6 oz., this is the lightest headset available with a certified noise reduction rating (NRR) of 24 dB. Three position tension adjustment (patent pending) rotates tension from low to high faster than any headset in its class. Strengthened headband has stainless steel at stress points for durability. Foam and gel ear cushions included. Also features stereo/mono switch, dual volume controls, electret microphone and carrying case.
Helicopter Version: Same as above but with in-line battery system, coil cord and U-93 A/U plug.