By Honeywell Impact Sport Sound Amplification Electronic Shooting Earmuff. AUX Input jack & cord. Auto shut-off (includes 2 AAA batteries). Impact Sport Sound Amplification Electronic Earmuff. The Impact Sport Sound Amplification Electronic Earmuff offers the ultimate in safety and ear protection. The safety is delivered through distortion-free amplification (up to a safe 82 dB) of important low level sounds like range commands and conversation. The protection comes from instant blocking of any noise above 82 dB. Designed for use at the range or in the field, this earmuff also features low profile earcups that won’t interfere with when aiming. The headband is padded for comfort, and telescopes to ensure a secure, custom fit. An external audio jack lets the earmuff do double duty as stereo headphones when connected to an MP3 player or other audio source. Directionally placed stereo microphones amplify range commands and environmental sounds to a safe 82 dB. Amplification shuts off at 82 dB, and patented Air Flow Control technology provides optimal noise reduction across all frequencies. Ultraslim earcup with cutout allows for full clearance of stock. Custom Fit & Comfort. Padded, telescoping headband adjusts for a comfortable, non-slip fit. Convenient folding design for easy storage on the range or in the field. Connect to external MP3 player, scanner or other audio device. Snap-in ear cushions make replacement easy and extend performance of earmuff. Features auto shut-off after 4 hours and snap-on lid for easy replacement (includes 2 AAA batteries). Fold out the earcups as shown. Place earcups over each ear. Adjust the headband by sliding the headband up or down. Do’s and Don’ts of Howard Leight Earmuffs. Do: Secure ear cushions over the ear for a firm seal. Don’t: Allow hair to obstruct the ear or the earmuff’s secure fit in any way. Don’t: Allow the ear cups to sit crooked or askew over the ear. Do’s and Don’ts. 10.12 x 6.54 x 4.61 inches; 1.06 Pounds. 6.54 inches x 10.12 inches x 4.61 inches. Weight: 1.06 lb. We are always working hard to ensure your package arrives as soon as possible.