Features: 1. Quality material makes it firm and durable, which has long service life. 2. Precision manufacturing makes it has stable and professional performance. 3. Original standard, direct replacement for the old or broken one. 4. Built to strict quality control standards, dependable to use. 5. Simple to install, no modification needed, convenient for using. Specification:  Item Type: Brushed Motor Controller Material: Aluminum + ABS Color: As picture shown Brushed Controller: Current Limit: 28A Rated Power: 500W Motor Set: Brushed DC motor Throttle: Speed Adjustment Signal: 0.8v-4.3v Power Display: Normal: 23 V Above, 3 Green LED Half: 23v-20v, Yellow LED Vacuum: 20V or Less, Red LED Angle of Rotation: 0 °-70 ° Operating Temperature: -20℃ - +50℃ Fits standard 7/8 inch (22.2mm) handle bars Controller Wiring: Battery: Thick Black (Negative Power) / Thick Red (Positive Power) Motor: Thick Yellow (Negative Motor) / Thick Blue (Positive Motor) Power Switch: Thin Red (VCC) / Thin Blue Indicator: Red Thin (indicator Power Output) / Ultra-thin Black (negative Indicator) Brake: Ultra-thin Yellow (brake Signal) / Ultra-thin Black (negative Power) Speed Regulator: Ultra-thin Blue (speed Handlebar Signal Input) / Ultra-thin Black (negative Power) / Ultra-thin Red (5V Positive Power) Charging Port: Ultra-thin Red (positive Charge Input Power) / Ultra-thin Black (negative Power) Brake Light: Ultra-thin Red (positive Power) / Ultra-thin Black (negative Power) Package List: 1 x Controller  1 x Handlebar 1 x Handlebar Grip  1 x Power Cable 2 x Key