These aviation headsets combine the latest audio technology with superb comfort. The NoiseGard active noise compensation reduces cockpit noise by approx. 15 dB - so you don't need to have the radio as loud. The HMEC 46 headsets incorporate peak level protection which safeguards your ears from volume peaks in the headphones above 110 dB. Also available in the HMEC46-BV-K  that also includes stereo/mono operation, has individual left and right volume controls, a cell phone connector and and audio (iPod, MP3 player) connector.