Model No.: WM-XM500 Xiaomi electric scooter is no doubt one of the best selling models in the world. Its design, quality and performance are well known and appraised by most end users. The only weakness is the power only 250w or 350w, not enough for many European and American users especially those are over 100kgs, very hard to move on up small hills. This 500w motor electric scooter is modified based on this point. With a bigger power motor, it gives a faster speed and better performance on climbing. You may also noticed that this model is with rear drive motor which is pushing you go instead of pulling. If you want know more of it, please do not hesitate to contact us. OEM is available, and OEM with your own idea is welcomed.