Features1Scope of Application: Applicable to 24V 36V 48V 250W 350W motor, which can be used for modification of electric assist bicycle, electric bike, electric scooter, etc. and replacement of damaged parts. You can modify and use it according to your own conditions. 2S866 Display: The shell uses ABS material, and the display screen interface is clear, providing you with a variety of control and digital display functions of vehicle status, which can display the riding speed, riding mileage, power assisted gear, power indicator, fault code prompt, headlight display, electric power, etc., which is convenient for reading data while riding, and buttons are quick to operate and convenient to use. 317A Controller: The 17A 3 mode controller supports sine wave, with Hall mode and without Hall mode. The controller is made of aluminum alloy shell with grooved design and good heat dissipation performance. 4Package List: This electric bike lithium battery retrofit kit includes 17A controller, S866 display, power assisted magnetic point, 130X thumb throttle, power off sensor and controller storage bag, which can be used alone or in combination. 5Applicable Handlebar Installation: LCD display and 130X thumb throttle are suitable for 22.2mm handlebars. Easy to install and use.SpecificationItem Type:ElectricMotorControllerKitColor: As Pictures ShownWeight: Approx. 748g / 26.4ozController Parameters:Controller Material: Aluminum AlloyCurrent: 17 1ASpeed Setting: 1.1-4.2VBrake Input: Low LevelApplicableMotor: 250W 350WDisplay Meter Parameters:Material: ABS, AcrylicApplicable Handlebar Installation: 22.2mm Diameter HandlebarDisplay Meter Function: Speed Display,PowerAssisted Gear Display,PowerIndicator, Fault Prompt, Total Mileage, Single Mileage, Headlight DisplayCommunication Protocol: No. 2 Communication ProtocolPackage List1 x 17A 3 Mode Controller1 x Controller Wiring Diagram1 xS866Display Meter1 x Display Meter Instruction1xPowerAssist Sensor Connecting Wire1xPowerAssist Sensor Plate1 x 130x Thumb Throttle2xPoweroff Sensor1 x Double Sided Adhesive1 x Controller Storage Bag2xPoweroff SensorMagnet