1. Circulating Ventilation, Say Goodbye To Fogging, Replace The Hot Air Inside The Mask With The Cold Outside Air Through The Micro-type Turbo Fan 2. Multi-Level Adjustment, Easy To Choose, The Dual-Drive Circulating Fan Has Two Gears, 1 Gear For Comfortable Wind, 2 Gears For Sports Wind 3. 600mAh Large Capacity, Long Battery Life, 600mah Large-Capacity Lithium Battery, Can Be Used For 4-5 Hours In The Of Comfortable Wind, And Can Be Used For 3-4 Hours In The Second Gear Of Sports Wind 4. Multiple Ventilation Structures, Optimized Ventilation Openings, Blowing Air At The Same Time To Draw Out The Internal Hot Air And Input The External Cold Air 5. Porous Heat Dissipation, The Mask Reserves A Number Of Cooling Holes To Control The Temperature Inside The Mask Charging Time:About Two Hours Battery Life:1 Gear 4-5h, 2 Gear 3-4h Colour:Black & Orange Material:ABS Size:Mask Size:17x10x12cm, Fan Size:5.4x3.3x10.8cm Package Contents: 1 * Mask 1 * Fan 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.