1. External wave wheel, the left and right sides of the wave wheel, can be adjusted before and after the height of the mask, better adapted to users wearing glasses 2. 75% increase in the effective area of the mask, greatly reducing the pressure on the face and making it easier to wear 3. Built-in two high-speed silent fans for stronger wind power 4. Two-way magnetic suction, easy to install and remove the fan 5. When the weather is hot, blowing cool air inward, wearing cooler; when the weather is cold, exhausting air outward, the lens is not easy to fog up, wearing more breathing sense 6. Fan speed: 7000 rpm 7. Fan battery capacity: 500mAh 8. Fan use time: about 3h 9. Size: about 17 x 11 x 8cm 10. Weight: about 134g 11. Note: the VR in the picture is for effect only, shipping without
