The Walker's FireMax Electronic Earmuffs with Rechargeable Battery are the perfect choice for the type of people who want a rechargeable option for hearing protection when batteries aren't close at hand. The FireMax can be charged with a USB-C charging cable to run for 150 hours on a charge. Featuresa Works in tandem with the Firemax Walkie Talkie (550264)a Slim low profile designa Digital audio circuita Rechargeablea Low noise/Frequency tuned for natural sound clarifya Auto shut offa Digital soft touch silent button operationa 2000 mAH (150 hours battery life)a IP54 rateda 4 Frequency modesa Universala Clear Voicea High Frequency Boosta Power Boosta USB-C charging porta Rubber Tacti-Grip headbanda Cooling gel earpads (available on most models)a Full dynamic range HD Speakers for clear balanced sounda Sound activated compressiona Sound dampening composite housing&b...