Walkers Raptor uses cutting-edge bone conduction technology to amplify surrounding noises When paired with the included ear plugs, the Raptor also provides high-NRR hearing protection for when youre on the range or in the field. Walkers introduces the RAPTOR, a radical new approach to hearing enhancement & protection. Utilizing bone-conduction technology to amplify ambient sounds by transmitting sound waves through bones in the head to the inner ear rather than through the ear canals. Used purely as an enhancement device, Raptor delivers unparalleled comfort with nothing covering or inserted into the ear canal. Pair it up with your choice foam or custom plugs and the Raptor provides hearing protection through Walkers legendary SAC (Sound Activated Compression) combined with the plugs NRR Rating. A combination that cant be beaten.