Feature: 1. HIGH PERFORMANCE: The Brush Controller adopt excellent single-chip microcomputer as the controller main control chip to control and protect the motor and battery of the electric vehicle, and improve the reliability and service life of the product. 2. SAFE AND EFFICIENT: With protection functions such as under-voltage protection, over-current protection, stall protection, etc., ensuring the use and safety of electric bike. 3. PTOTECTIVE AND RELIABLE: Intelligent control, reliable protection of electric bicycle motor and battery. 4. CONVENIENT TO USE: With long line thumb throttle grip, easy to operate. 5. IDEAL ACCESSORY: Wonderful accessory for electric bicycle. Specification: Condition: 100% Brand New Item Type: E-Bike Accessory Model: YK-31C Material: aluminium alloy Color: As picture shown Weight: Approx. 345g Rated voltage: 24V Rated power: 500W Under voltage: 20 ± 0.5V Thumb throttle grip: 1-4V Package List: 1 x Controller 1 x Thumb throttle grip