Clips right onto my bag. Guys this is an fake one. I was trying slide it in the slot and it would only go half way. Color me very disappointed ☹️ I was looking for a cheaper solution that would give me the same effect. It does charge my 3 devices nicely. The ones that do fit are very snug and benefit from the same fine-tuning of the fit. This is my 2nd RollerMouse. Upon examining them the soles are completely different, as you can see in the pictures below. The insole is extremely comfortable and a fair amount of arch support too.