Howard Leight Impact Sport Bolt Digital Electronic Shooting Earmuff, Black. LIGHTNINGFAST ATTACK TIME Digital compression circuitry offers a 5 millisecond attack time 250X faster than the classic Impact Sport to compress any noise that exceeds a safe 82 dB NRR 22. 5X SOUND AMPLIFICATION Enhances low level frequencies like range commands conversation with fellow shooters and animal noises ideal for indoor outdoor shooting and hunting in the field. RECESSED MICROPHONES Reduces wind noise while providing clear directional sound allows the user to easily identify a sounds origin which is a great benefit to hunters in the field. SLIM DESIGN Low profile earcup with rifle cutaways for gun stock clearance allow use in any shooting environment adjustable padded headband for comfort folds for easy storage waterresistant. INCLUDES Belt clip extra earcup cushions 2 AAA batteries AUX input and 35 mm connection cord for MP3s and scanners 4hour auto shutoff increases battery life approx 150 hours.