Protect your hearing at the range with the WalkerFTs Razor Slim Protection Muff- Includes audio input jack and recessed volume control knobs- Features a comfortable headband with metal wire frame that folds for easy storage- Operates on 2 AAA batteries included- Composite housing gives you more effective sound dampening- Independent volume controls give you greater control over the sound- Features full dynamic range HD speakers for clear balanced sound with sound-activated compression reaction of 0.02 seconds- Boasts a noise reduction rating of 23 dB with 2 omnidirectional microphones- Low noise/frequency tuned for natural sound clarity