MOSSENEBIKES： 1、BAFANG Latest model M625 1000W mid-drive motor kit with 19Ah battery, DPC181 display, headlight, taillight, speed sensor, etc. All necessary mounting accessories are included. 2、Speed-sensored central motor with slow startup provides a smoother and fabulous cycling experience. Solid construction motor with the integrated hidden controller. High performance in climbing and loading. 3、Made up of authentic Grade A 21700 battery cells made by Samsung. Fast-charging, long-life battery with a communication protocol that indicates accurate and real-time battery capacity. 4、We recommend this electric bike conversion kit for most bicycles ≥ 27.5 inches. Please check if the battery size is compatible with your bicycle frame.