Model No.: WM-M1 This is still the very best choice of 2 wheel electric for personal mobility use even though there are many new models in the past five years. it is the 4-5th versions, and improved a lot on the mechanical structure which in the past the folding bar and folding point are with big space and shacking a lot when driving especially when take brake and speed up. Wellsmove also improved it by well matching of electronic parrs, mainly the controller and motor so that it can go 20% longer distance than other suppliers with same battery. More detail information, please do not hesitate to contact us. OEM is available, and OEM with your own idea is welcomed.