Wind-Powered Defogger:Universal Air Pump Delivers Wind To The Inside Of The Glasses To Blow Away,The Water Vapor And Achieve The Defogger Effect Adaptation And Installation: Users Need To Manually Open Holes For The Goggles, Which Can Be Adapted To Most Goggles Magnetic Adsorption: Magnetic Connection, No Complicated Operation Required. Convenient For Users To Put On Or Goggles Wind Speed Adjustment:The Knob On The Top Of The Air Pump Can Adjust The Wind Speed Power Indicator Light:When The User Presses The Power Button On The Side Different Lights ,Be Displayed According To The Remaining Power Colour:black Material:plastic note:Glasses not included Package Contents: 1 * Goggles Demisting Device 1 * Charging Cable 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.