Features: Brushed Controller: Size: 8 x 6.5 x 4cm(500W); Rated voltage: DC 36V Current limit : 23A; Rated power: 500W Matching motor: DC brushed motor Under Voltage Protection: 30V Specification: Throttle: Throttle Works Voltage: DC5V Speed Adjusting Signal:0.8V~4.3V Working temperature: -20 ~ +50 Fits standard 7/8 inches(22.2mm) handle Controller Wires Interface Definition: Battery: Thick Black (Power Negative) / Thick Red (Power ) Motor: Thick White (Motor Negative) / Thick Blue (Motor ) Ignition Switch: Thin Red(VCC)/Thin Blue Indicator: Thin red (Indicator power output) / thin black (indicator negative) Brake: thin yellow (Brake signal)/ thin black (Negative Power) Charge Port: Thin red (charge input power ) / thin black (Power negative) Brake Light: Thin red (power ) / thin black (Power negative) Speed governor: Thin blue (Speed handlebar Signal input) / Thin black (Negative Power) / thin Red (5V Power) color:Black + silver Material:ABS+Metal Package Contents: 1 x Brush Controller 1 x Throttle Knob 1 x Normal Handle Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.