Function: Excellent Performance: The brushless DC controller features high-strength components that improve work efficiency and provide strong start-up and climbing power. Precise Control: The brushless controller for electric bicycles offers precise motor control, significantly increasing motor speed and power. Compatible Motors: The sine wave controller has stable performance and is compatible with QS in-wheel motors or QS mid-drive motors, ensuring smooth operation. Battery Protection: The high-performance controller can effectively protect the battery and extend its lifespan while simultaneously increasing the overall range of the scooter. Durable Construction: Made of robust ABS and metal, the controller features high temperature resistance and a strong structure, ensuring long-lasting and stable use. Specifications: Item Type: Brushless DC Controller Material: ABS + Metal Voltage: 48V to 72V Overvoltage: 91V Undervoltage: 63V Bus Current: 200A Phase Current: 400A Speed: 4500 Number of Pole Pairs: 5 Hall Angle: 120 Limit Current: 80A Rated DC Current: 100A Max Power: 8600W Magnetic Flux Damping: 150% Rated DC: 340A Waterproof Rating: IP67 PC Programmable Support (with supporting debugging software) Functions: S-Mode P-Mode R-Mode LIN Temperature Monitoring Anti-theft Protection High Brake Three Speeds CAN-BUS Standby Mode Standard Controller Functions: Hall plug, reverse operation, 0V low brake, throttle (0-5V), 12V high brake, ignition, single-wire, Hall meter cable, programming interface, three speeds, sport mode, parking, anti-theft protection, regenerative braking, weak magnetic current. The EM series controller is a sine wave controller and a low magnetic brushless DC controller. Generally, it is better to match it with a QS motor. If you want to match it with a new motor, some parameters need to be tested manually. Suitable for 1000W to 3000W motors Package List: 1 x Controller 3 x Connection Cables 7 x Screws