Controller line interface definition: Battery: thick black (power supply negative) / thick red (power supply positive); Motor: dark white (motor negative) / dark blue (motor positive); Ignition switch: thin red (VCC) / thin blue; Indicator light: thin red (indicator power output) / thin black (indicator negative); Brake: thin yellow (brake signal) / thin black (negative power supply); Charging port: thin red (charge input power supply positive) / thin black (power supply negative); Brake light: thin red (power supply positive) / thin black (power supply negative); Governor: thin blue (handlebar signal input) / thin black (negative power) / thin red (5V positive power supply). Specifications: Item name: Controller and Throttle Screw Grip; Rated voltage: DC 48V; Rated power: 1000W; Compatible motor: DC brush motor; Throttle working voltage: DC 5V; Speed control signal: 0.8V~4.3V; Power display voltage: DC 24V/350W/500W; Power display: Normal: above 23V, 3 LED green lights; Half: 23V ~ 20V, LED yellow; Empty: 20V or lower, LED red; Rotation angle: 0~70 degrees; Operating temperature: -20°C to +50°C; Fits standard 7/8 inch (22.2 mm) handlebars; Cable length approximately 59 inches (1.5 m). Electric bicycle scooter screw accelerator with power display, 5 LED battery indicator. Stickers: random styles, no specific style accepted. Product appearance, text, and color may vary between batches, but will not affect functionality. Color: As shown. Material: metal. Package contents: 1 x Brush Controller, 1 x Throttle Knob, 1 x Normal Handle, 2 x Key. Only the items listed are included. Note: Lighting and monitor differences may cause slight variations in color. Measurement error allowance: +/- 1-3 cm.