Wear Primos Boost Series earmuffs at the range or in the field and enjoy day-long comfort and hearing protection you can count on. Four omni-directional, wind-resistant, high-frequency microphones enhance your hearing by up to eight times. Primos shooting muffs also feature independent volume controls with Adjustable Frequency Tuning that can be fine-tuned to your hearing needs and environment. Primos Sound Activated Compression for sounds above 85db and a noise reduction rating of 24db for superior hearing protection. Constructed of high-quality ABS plastic with butyl rubber earpads, they're lightweight and comfortable enough for all-day wear. 200 hours of battery life. Includes protective hard carry case. Made in USA.