Walker’s Razor Electronic Ultra Low-Profile 23dB NRR Ear Muffs deliver clear, balanced sound; natural sound clarity; compression circuitry to protect hearing; and all-day comfort. Ultra low-profile ear cups include 2 U.S. flag patches, rubberized coating, 2 high-gain, omni-directional microphones, volume control, low noise and an audio input jack. Frequency is tuned for natural sound clarity. Compact folding design features a comfort headband with metal wire frame. Sound-dampening composite housing provides 23dB NRR. Sound-activated compression with 0.02 second reaction time. Recessed volume control knob. External battery door. Operates on 2 AAA batteries (included).