Features: Built-in directional microphone amplifies range commands and other ambient sounds to a safe 82 dB for more natural listening and enhanced communication. Features low-profile earcups for easy removal; adjustable headband for a secure fit; compact foldable design for easy storage. It provides ultimate safety and hearing protection. Safety is achieved through distortion-free amplification (up to 82 dB safety) of important low-level sounds such as range commands and dialogue. Protection comes from instantly blocking any sound above 82 dB. Designed for use on the shooting range or in the field, these earmuffs also feature low-profile earcups that won't interfere with aiming. The headband is padded for comfort, and the binoculars ensure a secure, customized fit. The external audio jack allows the earmuffs to function as stereo headphones when connected to an MP3 player or other audio source. Description: Noise reduction function, converts high-decibel noise and crackling collected in 360 degrees into binaural microphones that are acceptable for human hearing, automatically handles noise above 82 decibels and has a noise reduction ratio of 22 NRR, which can capture and amplify environments below 18 decibels / Speech sound External audio jack for connecting devices, MP3 players or other audio sources, earmuffs can also be used as stereo headphones One-button volume knob to control noise-canceling reception on/off and volume The headband size can be adjusted as needed, foldable design for easy transport and storage of earmuffs for use in the field or in the field Comfortable and adjustable headband. Noise reduction, protect hearing. This allows you to hear important commands and important ambient sounds within range during hunting. Specifications: Battery type: 2 AAA batteries (not included) Size chart: Unfolded dimensions: Approx. 124 x 96 mm / 4.88 x 3.78 inches Folded dimensions: Approx. 101 x 96 x 124 mm / 3.97 x 3.78 x 4.88 inches: 1 pair of headphones 1 x charging cable 1 x user manual