Product category: Installation method: 1. Install the front wheel: Just press it in hard~ 2. Remove the front wheel: Use the small wrench provided to pry it gently~~The wheel will come out~~Then cover it~3 .Replace the rear wheel: push the rear wheel open the cover~press the heel button~the rear wheel will pop up automatically~~4.Retract the rear wheel: keep pressing the heel button~~press the rear wheel inward~~then cover Just put the cover on, dear, the two-wheeled version can be converted into a single-wheeled version by removing the front wheel~ Then hide the rear wheel and it can be turned into an ordinary shoe~ One shoe can be used for three purposes. For beginners, I recommend the two-wheeled version~ The two-wheeled version is relatively stable~Easier Get started, dear, the shoes are standard size, dear, buy according to the size you usually wear, dear.