The BenchMaster Rifleman TAC Electronic Earmuffs are ultra-rugged and feature an NRR of 22db with amplification for the most demanding user. The soft ear pads and headband make all day use a breeze with lasting comfort. This unit also features a sleek/low profile cup design making them suitable for long gun use as well, especially useful for sighting in. Also featuring a super-fast reaction time of 2 milliseconds. In addition to the comfort and safety rating, the Rifleman Tac Electronic Hearing Protection is water-resistant with an IPX 5 rating. There is a 3.5 mm audio input jack that is compatible with mp3 players and mobile phones. Control volume from external source independent from the internal volume control so you can listen to music with amplification turned off.