ANR utilizes precisely engineered speaker modules which create a counter-balancing noise to cancel out up to 21 decibels of aircraft noise. The system operates on aircraft power (reduced to 9 volts) or on a single 9-volt battery.

ANR kits include a pair of ANR modules, a 9-volt battery pack, a pair of perfect-fit silicone gel ear seals, earcup foam insulation, speaker covers,  and double sided sticky tape.

For HGU-33, HGU-55, and HGU-68 helmets you will need plastic earcups.