Specification:Item Type: Electric Bike Conversion KitMaterial: Aluminum Alloy + ABS PlasticColor: As Picture ShownApplication: for 250W, 350W MotorGross Weight: Approx.545g/19.2ozProduct Size: Controller Box 82x52x30mm/3.2x2.05x1.2in, Panel 81x48mm/3.2x1.9inController Rated Voltage: 36V DC /48V DCController Maximum Current: 15AController Speed Setting: 1-4.2VController Brake Input: Low LevelBOOSTER: 1:5Applicable Motor Power: 250W, 350WConnector Type: Fully Waterproof ConnectorS866 instrument working voltage: DC 24V, 36V, 48V, 60V compatible (instrument selection setting).S866 instrument function description:1. Display function: speed display, power indicator, fault indicator, total mileage, single mileage2. Control setting functions: power switch control, wheel diameter setting, idle auto sleep time setting, backlight brightness setting, start mode setting, drive mode setting, voltage level setting, controller limit value setting3. Communication protocol: UARTDisplay all contents of the screen (display all contents for 1s after startup)3.1 Display of battery quantity and BMS remaining quantity3.2 Multi-function display area: total mileage ODO, single mileage TRIP (unit: mile, km), single startup TIME TIME, battery voltage VOL, DST: battery life3.3 Speed display areaAVG: average SPEED, : maximum SPEED, SPEED: current SPEED: unit: Mp/h km/hThe speed signal is taken from the Hall signal in the motor and sent to the instrument by the controller. (Time of a single Hall cycle, unit: 1MS) The instrument will calculate the true speed based on the wheel diameter and signal data (the amount of magnetic steel required by the motor hall)3.4 Vehicle power gear adjustment, 0-9 digital display and bar display.How to