Zhuhai Shuangye Electronic Technology Co., Ltd. established in 2006 and located in the beautiful coastal city Zhuhai. As professional manufacturer engaged in the research?development?production?sale and service,Website:http://www.syebike.com, we are committed to manufacturing electric bike?electric bike kit?electric bike lithium battery?charger?lithium battery BMS and electric bike controller. We also provide OEM or ODM servic