Advanced Noise Reduction Technology: The for M20 Electronic Earplugs are designed to protect your hearing in loud environments. Ideal for hunting sports, these earplugs feature state-of-the-art electronic dampening technology that automatically reduces harmful noise levels while allowing normal conversation and ambient sounds to be heard. Comfortable and Secure Fit: Tailored for extended wear, the M20 earplugs offer a comfortable fit that stays secure during active use. the ergonomic design ensures maximum protection without compromising on comfort. and User-Friendly: Built to withstand rugged use, these headphones are both and easy to operate. With intuitive controls, users can easily adjust settings , making them a reliable choice for any outdoor sports enthusiast. Noise reduction value+NRR22 Intuitive one click operation Equipped with 3-speed adjustable sound gain function to enhance auditory perception Rechargeable, high battery life Two sound modes (indoor and outdoor) Power on, power off, low battery prompt Charging automatic shutdown, no operation for two hours automatic shutdown High portability, high comfort, and high compatibility IPX-4 waterproof rating Due to different batches, there may be differences in product printed text, which will not affect use. Colour:D:Brown Material:ABS Package Contents: 1 * Electronic Earplugs kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.