The built-in directional microphone amplifies range commands and other ambient sounds to a safe 82 dB, thereby providing more natural listening and enhanced communication. Adjustable headband ensures a secure fit; compact folding design for easy storage. It provides ultimate security and ear protection. Provides safety through lossless amplification (up to 82 dB of safety) of important low-level sounds such as range commands and dialogue. This protection comes from immediately blocking any noise above 82 dB. When connected to an MP3 player or other audio source, the external audio jack allows the ear cups to serve the dual function of stereo headphones. The earmuffs are made of silicone and are specially designed for wearing glasses. The outer lip of the silicone earmuffs will not squeeze your ears when wearing glasses, and will not change the comfort and noise reduction effect of the earmuffs. Whether you need to wear glasses or not, high-quality silicone will not change the comfort and noise reduction of the earmuffs. Silicone earmuffs-earmuffs are made of silicone instead of sponges. Therefore, the earmuff has higher elasticity and firmness, and the ears are more comfortable. Package 1 x Headset 1 x Connection cord NoteHeadphones do not include glasses