Bundle Includes: Walker’s Razor Slim Electronic Muff (Carbon), Shooting Hearing Protection Case, and Shooting Glasses Ergonomic Design: This muff features two omnidirectional microphones to assure that you don't miss anything and get crisp clear audio. It is engineered with ultra-low profile ear cups with rubberized coating Noise Reduction Rating: Delivering an impressive Noise Reduction Rating (NRR) of 23 dB, this muff is sure to protect your hearing, without interfering 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 Audio Input Jack: Equipped with full dynamic range HD speakers for clear balanced sound, it also comes with an audio input jack Noise Reduction Rating (NRR) of 23 dB Ultra-low profile ear cups with rubberized coating Two omnidirectional microphones Audio input jack