1.External Wave Wheel Adjustment: left and right side wave wheels, can adjust the height of the mask back and forth, better adapted to users wearing glasses. 2.Magnetic installation Wave wheel adjustment: fan two-way magnetic ---- easy to install and remove; external wave wheel ----- mask space height adjustment is more convenient. 3. Dual fan more powerful wind: built-in two high-speed silent fan, fan speed 7000 rpm, built-in 500mAh carp battery, can work normally for about 3 hours. 4. Fan installation: align the mask fan base position, oblique 45 ° placed, magnetic automatic adsorption installation. 5. Inward and outward - air circulation: when the weather is hot ---- blow cool air inward, wearing cooler; when the weather is cold ----- exhaust air outward, the lens is not easy to fog, wearing more breathing sense. 6. Magnetic installation: fan two-way magnetic ---- easy to install and remove. 7.Fan emergency power supply: the fan consumes very little power, forget to charge, you can also let for Quest3 emergency power supply.