Professional Noise-Canceling Earmuff: OPSMEN M31-MOD3 is an electronic pickup and noise-canceling headphone during daily training. Suppresses harmful noise above 82 dB. Super fast attack time less than 1ms to avoid any noise impact. Noise reduction rating NRR22.

360° Full Environment Perception: M31-MOD3 can enhance weak sound in the environment and track human voice to restore and optimize, with 3-levels adjustable sound effect gain function to enhance hearing. Improves the clarity of conversation and the surrounding environment alertness.

Comfortable Wearing Experience: Adjustable headband with three different sizes. (Head circumference perimeter S: smaller 21", M:21"-23.5", L: bigger 23.5"). Foldable earmuff design. The design is ergonomic, fits the ears better, and provides more professional noise reduction protection. An anti-sweat. Waterproof in accordance with IPX-5.

Humanized Design: Power by 2x 1.5V AAA batteries (come included batteries). New alkaline batteries provide approx. 300 hours' operation. 4 hours auto shut-off mechanism, low battery prompt. Comes with 3.5mm AUX audio input cable for media devices.

NRR (ANSI): 22 db
Power supply: 2 x AAA
Estimated battery life: ~ 350 h
Compliant with CE / RoSH / ANSI S3.19-1974
Waterproof: IPX-5
Weight: 350 g