The e-bike speed motor controller is housed in an aluminium alloy shell, providing greater waterproofing and durability. Efficient heat dissipation helps protect the internal circuit and prevents thermal overload, improving reliability during use. The controller includes undervoltage protection, over-current protection, blocking protection, and other safeguards to ensure safe operation of electric bicycles. Wiring is color coded with distinct functions; only the required connections are provided. Unnecessary functions are omitted without affecting use, making installation and wiring convenient. Use scenarios: - City commuting: Reliable protection and simple wiring support daily riding with reduced risk of electrical issues. - Mountain or hill riding: Effective heat management keeps performance stable during long climbs and high load. - DIY builds and upgrades: Flexible wiring with only needed connections simplifies integration with your motor system. Key attributes: - Function: speed motor controller with multiple built-in protections - Compatibility: designed for e-bike systems with selective wiring to required functions - Material: aluminium alloy shell for durability and weather resistance - Performance: enhanced heat dissipation and multiple safety protections to ensure safe use