Controller line interface definition: Battery: thick black (power supply negative) / thick red (power supply positive) Motor: dark white (negative pole of the motor) / dark blue (positive pole of the motor) 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) Item name: Controller and Throttle Screw Grip Rated voltage: DC 36V Rated power: 500W Compatible motor: DC brush motor Throttle: Throttle working voltage: DC5V Velocity 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 degree ~ 70 degree Operating temperature: -20C ~ +50C Fits standard 7/8 inch (22.2 mm) handlebars Cable length: approximately 59 inches (1.5 m) Quantity: 2 (1 screw throttle handle and 1 normal handle (compatible with thumb shifter)) Electric bicycle scooter screw accelerator with power display, 5 LED battery indicator. Color: As shown Material: Composite material Package Contents: 1 x Brush Controller 1 x Throttle Knob 1 x Normal Handle 2 x Key NOTE: Sticker: Random, do not accept specific requests Only the above package content, other products are not included. Note: Lighting and different displays may cause the color of the item in the picture to be slightly different from the actual item. Measurement allowed error is +/- 1-3 cm.