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 Matching 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: 0degree ~70degree Working temperature: -20Celsius~+50Celsius Fits standard 7\/8 inch (22.2 mm) handles Cable length is approximately 59 inches (1.5 m) Quantity: 2 (1 Screw throttle handle and 1 normal handle (matching thumb handle)) Electric bicycle scooter screw accelerator with power display, 5 LED battery indicator. Colour: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,don't accept the specified Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.