1、Rich Content: There is 22A controller, S900 panel, 130X thumb throttle, 8C power assist sensor, 1 to 2 cable included in the package, the rich content can meet your needs to convert your electric bikes or repair the damaged part. 2、Outer Housing: The controller housing is made of high quality metal with grooves designed to protect the internal circuitry from thermal overload due to good heat dissipation. 3、High Performance: LCD panel adopts high quality ABS material which is light weight, has good toughness and waterproof properties, providing better protection for internal circuits, making it more durable. 4、High Performance: S900 display has a variety of functions, can be used as a driving computer, and control the entire bike system after conversion, compatible with 36V and 48V voltage; Color display so you can more easily see the data on the panel, such as speed display, steering gear, power indicator, troubleshooting tips, total mileage and single driving mileage, headlight display, single time, according to top speed setting, automatic idle sleep time setting, backlight brightness Settings, set voltage level, PAS connection, help promote mode 6 km/h, Ensure mileage. External 3 way button for easy operation. 5、Application Scope: Suitable for 500W motor; Main uses is for DIY electric bike, electric bike, electric scooter, folding bikes, etc.; Easy to maintain, the lithium ion bike modification greatly enhances the pleasure of riding.