The AKT1 Sport(TM) AK Premium 25dB NRR Electronic Hearing Protection - Black has multi-directional microphones for clear, 360deg of situational hearing with 6x sound amplification so you can stay alert to your surroundings. Boasting a Noise Reduction Rating (NRR) of 25dB, this pair of electronic earmuffs automatically blocks harmful noise to keep your hearing safe. Plus, a rubber control knob makes adjusting noise levels easy even when wearing gloves. Soft hand-sewn memory foam cushions are breathable and provide all-day comfort while a secure, custom headband features hand-sewn mesh inserts for maximum airflow along with mesh cut out on top to make wearing a hat easy. Plus, it features adjustments from extra-large to small for more range and a secure fit. Operates on 2 AA batteries (included) with a 4-hour auto-shutoff to conserve battery life. Also features an auxiliary input jack.Specifications and Features: Multi-directional microphones for 360deg of situational hearing 6x sound amplification NRR of 25dB Rubber control knob makes adjusting noise levels easy Soft hand-sewn memory foam cushions are breathable and provide all-day comfort Secure, custom headband with hand-sewn mesh inserts for maximum airflow Operates on 2 AA batteries (included) with 4-hour auto-shutoff Features an auxiliary input jack