The RAPTOR is a radical new approach to hearing enhancement and 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. A combination that can’t be beaten. NRR – 33dB (when paired with included ear plugs). Users hear ambient sound via bone conduction. Independent volume controls. Sound activated compression. Rechargeable lithium battery. Micro USB charging cable included.