Feature: 1. Compatibility: 40A sine wave controller is suitable for 36V1500W, 36V2000W, 48V1500W, 48V2000W, 52V1500W, 52V2000W brushless motors with or without hall. And comes with self learning function. 2. Excellent Heat Dissipation: The controller's outer casing is made with groove design, which offers efficient heat dissipation. This not only protects the internal circuit but also prevents thermal overload. 3. XT60 Plug: The controller with an XT60 plug. The XT60 plug plastic case is made of insulating material, which is not easy to burn in case of fire to ensure the safety of the battery. 4. 3 Mode Controller: With leaming line can prevent the motor from reversing, If the motor reverses, it can be pulled out only by connecting the 2 leaming lines for forward rotation, without long term connection. 5. Speed Limit Line: With sine wave design, the noise is smaller and more stable when riding. The speed limit line for easy speed limit manipulation. Simply disconnect 2 speed limit line to disengage the speed limit. Specification: Item Type: Electric Cycle Controller Panel Material: Aluminum Alloy, ABS MOS Tube: 15 Maximum Current: 40±1A Rated Voltage: 36V 48V 52V Communication Protocol: Protocol No.2 Brake Input: Low Level Panel Size: Approx. 100x61.5mm / 3.9x2.4in Controller Size: Approx. 185x41x82mm / 7.3x1.6x3.2in. Package List: 1 x Electric Cycle Controller 1 x Controller Manual 1 x Panel 1 x Panel Manual