PROTECT YOUR HEARING - Walker's Razor Ear Muffs have an ultra low-profile design featuring extra slim ear cups, for a secure fit; these ear muffs protect against hazardous noises, while still letting you clearly hear everything going on around you | SOUND AMPLIFICATION - WalkeràRazor Ear Muffs amplify safe sounds using two hi-gain microphones to provide clear omni-directional hearing; The low end frequencies are enhanced to produce accurate, natural sound | RUGGED DESIGN - These muffs feature a rugged design with a rubberized coating, helping to prevent damage to the interior electronics; the housing is made from a sound dampening composite; the headband is a padded metal wire frame | EASY-TO-USE CONTROLS - These muffs have a volume control knob on the outside that is slightly recessed - a perfect balance between providing easy-to-use controls, and preventing accidental volume adjustments; the battery door also opens from the exterior | LISTEN TO MUSIC - These ear muffs also have an audio input jack, allowing you to plug in your phone or other favorite sound source, effectively converting these ear muffs into a set of headphones with hearing protection