... accept Shanghai Houlong Electronics Co., Ltd.Brand : RomaiElectric bicycle hub motor Specifications:Model No: BM-031.Size: 16*32.Output power ... Long life8.High speed9.Water proof10.Composition servo system without encoder 11.High efficiency and low noise CE-approved 12Customized types ... and we've got CE certificate.Our main products are motor,charger,controller,and other E-Bike equipment.Service:1. ...