The e-Bike Speed Motor Controller features an aluminum alloy housing that is waterproof and durable, designed to withstand wet conditions and daily use. Its efficient heat dissipation protects the internal circuitry and helps prevent thermal overload during long or high-demand rides. The controller provides undervoltage protection, overcurrent protection, stall protection, and other safeguards to ensure safe and reliable e-bike operation. A multi-color, multi-function wiring harness lets you connect only the required functions. Unneeded features are omitted without affecting use, making wiring simple and tidy. Use scenarios: - Upgrading or customizing an e-bike: connect only the necessary functions for a clean, tailored setup. - Daily commuting in variable weather: rugged, water-resistant housing plus protective features improve reliability. - High-load riding or long climbs: effective heat management helps prevent performance drops and protects components.