Walker's Razor X-TRM Digital Muffs has a high performing digital circuit delivers blazing fast reaction time, ensuring great hearing protection. The premium cooling headband is a mesh headband and has comfortable gel earpads. features include: active dynamic sound suppression, hi-gain omnidirectional microphones, and superior clear digital sound. The muffs have an audio input jack and recessed volume control knobs. Very well performing earmuffs for an amazing price.