Protections: Equipped with overload, short circuit, and overheating protections functions, automatically cutting off power in abnormal conditions to ensures user Speed Function: Features a built in intelligent speed control switches, allowing users to easily adjust the rotation speed according to actual needs, enhancing productivity in different work scenarios Efficient Control: Designed specifically for brushless electric impacts wrenches, this controller provides precisely motor speed and stable power output, ensuring efficient operations under various working conditions Aluminum Shell: The aluminum alloy shell excellent heat dissipation and impacts resistance, keeping the circuit board safe even during high load operations Strong Compatibility: Suitable for various types of brushless power tools and supports lithiums battery power supply, making it easy to pair with most market available lithium batteries, Manufacturer: ERRORY