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) Specifications: Item name: Controller and Throttle Screw Grip Rated voltage: DC 48V Rated power: 1000W Matching motor: DC brush motor Throttle: Dimensions: (Length x Depth) 10 cm x 2 cm. 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: 0~70 Working temperature: -20~+50 Fits standard 7/8 inch (22.2 mm) handles Cable length is approximately 59 inches (1.5 m) Electric bicycle scooter screw accelerator with power display, 5 LED battery indicator. Stickers: random styles, don't accept the specified styles colour: as shown Material: composite material Package Contents: 2 x Brush Controller 2 x Throttle Knob 2 x Normal Handle 4 x Key Only the above package content, other products are not included. Note: Light reflection 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.