Description: With a digit display that shows the rate in percent of actual speed to maximum speed and high quality circuit board ,protect the controller board from damage as well as dissipate heat .Providing steady and sensitive control of speed, working well on the right side of handlebar. This speed controller is made with high quality circuit board which ensures a longer service life.motor brushed speed controller & throttle grip with premium quality. High efficiency, high torque,low heat with reverse polarity protection, high current protection rated. Features: 100% brand new aftermarket motor brushed speed controller & throttle grip with premium quality. Providing steady and sensitive control of speed, working well on the right side of handlebar. Good grip, better and comfortable handling, non-slip. Easy installation, fit for 500W 24V/36V/48V brushed motor. Suitable for electric bicycles, electric tricycles, electric scooters. Specification: Condition: 100% Brand New Material: Aluminum, Plastic Color: As Picture Shown Brushed Controller Size: Approx. 8.3 * 6.5 * 3.7cm/3.2 * 2.5 * 1.4in Voltage: 24V,36V,48V(Optional) Under Voltage Protection: 20V,32V,42V(Optional) Power: 500W Package Weight: Approx. 600g/21.1oz Application: Electric bicycles, electric tricycles, electric scooters Package List: 1 * Brushed Controller 1 * Throttle Grip Note: Please allow 0-1 inch error due to manual measurement, thanks for your understanding. Features [PREFECT DESIGNED]With a digit display that shows the rate in percent of actual speed to maximum speed and high quality circuit board ,protect the controller board from damage as well as dissipate heat .Providing steady and sensitive control of speed, working well on the right side of handlebar. [HIGH QUALITY]This speed controller is made with high quality circuit board which ensures a longer service life.motor brushed speed controller & throttle grip with premium quality. High efficiency, high torque,low heat with reverse polarity protection, high current protection rated. [EASY TO USE]Make of aluminum shell and plastic ,simple and easy-to-use, just connected to the item, all is ready and easy installation, instruction labels on the interfaces for your easy installation ,fit for 500W 24V/36V/48V brushed motor. [UNIVERSE USE]Suitable for electric bicycles, electric tricycles, electric scooters,motorized bicycle, pocket bikes .Wide working voltage,applicable to a variety of DC motors, fans and other applications, can adjust the motor speed very well. [Note]:Please make sure that the electric door lock is docked during installation, so that it will be in a powered state. Otherwise, it may be an invalid installation. If you have any installation questions, please consult us in time.