[Excellent performance]: The motor has strong climbing ability and low motor running noise, eliminating tire noise. [Scope of application]: it is a wide voltage controller, 48V 60V 72V 84V can be universal, the maximum current limit is 80A(It does not mean that the output current is 80A, it only means that the controller can withstand a maximum current output of 80A. The current output size is also related to the battery and motor.), and it can be applied to brushless motors. [Outstanding upgrade accessories]: motor has thicker copper bars, higher inductance accuracy, smoother starting, and more comfortable riding. [Exquisite workmanship]: Our products are professionally manufactured, with stable performance, increased shell thickness, and better heat dissipation. High reliability. The uphill torques of the controller is increased, the power is strengthened, the speed can be faster, the smoothness of motor is better, and the life of the controller is longer. Colour:silver Material:aluminum alloy Size:about 25.5 x 12 x 7cm Package Contents: 2 x 3000W Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.