Specification:Item Type: Electric Bike Conversion KitMaterial: Aluminum Alloy + ABS PlasticApplication: for 500W Bicycle MotorGross Weight: Approx. 780g / 27.51ozProduct Size: Controller Box 125x65x40mm / 4.92x2.56x1.57in Panel Size: 96x68mm / 3.78x2.68inController Rated Voltage: 36V DC /48V DCController Rated Current: 11AController Maximum Current: 22±1AController Speed Setting: 1-4.2VController Brake Input: Low LevelController Low Voltage Protection: DC 30/40±0.5VConnector Type: Fully Waterproof Connector1 To 2 Line Description: One end is connected to the controller, the other end is connected to the panel and dial.Controller Line Definition:1. Red, Black Single Wire: Power wire2. Black Single Large Wire (9pin): Motor wire3. Black Single Wire (9pin): 1 to 2 wire4. Black Single Wire (3pin): Power sensor wireLCD8S Panel Functions: Up button, switch, button, button down, power assist sensor indication, battery capacity indicator, power, running , real time cycling, total travel time, the gas shows, 6 km/h thrust power system, the cycling speed (metric system), maximum speed, average speed, travel distance, total distance, battery voltage, brake display, backlight and headlights, ambient celsius, ambient fahrenheit.How to Use:Controller description: The wire color definition interface on the controller can be connected to the socket of the accessory to realize the function. For the specific operation, please refer to the wiring diagram and manual.Package List:1 x Controller1 x Panel1 x Panel Mounting Bracket4 x Panel Mounting Bracket Gasket2 x Panel Mounting Bracket Screws1 x Panel Manual1 x Thumb Throttle1 Assist Sensor1 x Controller Wiring Manual1 x 1 to 2 CableNote:Note that the retrofit kit must be a fully waterproof kit.