The for Smart chip driver chip uses a new framework and adopts a new calculation method inside. It can improve the processing speed and reduce power consumption according to your needs. It can process all functions at high speed and run. Thickened aluminum material, fast heat dissipation, improved stability. Reinforced screws are fixed with thermal conductive glue for better heat dissipation. High-power controllers use thickened copper wire to enhance reliability. Can be used for scooters, scooters, and electric vehicles. Product name: for Smart brushless DC motor controller. Size: Length 210 Width 110 Height 60mm. Working voltage: 60V-72V (V). Rated power: 3000 (w). For Smart brushless DC motor controller. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Please allow slight manual measurement deviation for the data. Just follow the Guest Checkout instructions. Also, the each additional item means exactly the the same color and size.