Feature:1. Function: The brushless speed motor controller will help you electric vehicle to start more smoothly, ensure more comfortable riding, better ensure your driving .2. Rated Voltage and Power: The rated voltage of the speed motor controller is DC36‑48V, the rated power is 500W and with IP55 waterproof grade, safe and dependable to use.3. Aluminum Alloy Housing: The motor controller housing is made of aluminum alloy with groove design to protect the internal circuit, facilitate heat dissipation and avoid thermal overload.4. Exquisite Workmanship: Professional manufacturing, high performance, the wires and interfaces of the notor control box are durable, and ensure low malfunction of long time use.5. Application: Suitable for wind turbine scooters, mechanical equipment, electric motorcycle DIY engine kits, push scooter, go karts, electric bicycles and many more other machines.How to Use:1. The upper three thicker blue wires, green wires, and yellow wires of the controller should be connected correspondingly to the motor blue wires, green wires, and yellow wires. Next, the controller Hall wires and the motor hall wires should be connected well.2. Then connect the two thicker red and black wires of the controller to the power supply, the red wire is connected to the positive electrode, and the black wire is connected to the negative electrode.3. Then connect the orange electric door lock