RUBBERIZED COATING: It is engineered with ultra-low profile ear cups with rubberized coating SPEAKERS AND AUDIO INPUT JACK: Equipped with full dynamic range HD speakers for clear balanced sound, it also comes with an audio input jack SOUND QUALITY: The Razor Slim Muff features sound dampening composite housing for providing smoother and suppressed sound quality. It is frequency tuned for natural sound clarity and also features sound activated compression, which will start after 0.02-second reaction time