1. The controller shell is made of aluminum material with a groove design to protect the internal circuit and provide efficient heat dissipation to help prevent thermal overload. 2. This is a brushless motor controller that delivers stable speed, responsive control, and smooth direction changes. The sine wave controller operates quietly and smoothly. 3. Wires and interfaces are designed for long-term use with low failure rates. 4. Suitable for electric bicycles, scooters, and similar applications. Material: Aluminum Alloy Color: As shown Package Contents: 1 x Brushless Controller Note: The package includes only the items listed above; other products are not included. Due to lighting reflections and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement may vary by +/- 1-3 cm.