Feature: 1. Outstanding Performance: The brushless DC controller features high strength accessories, improving work efficiency and offering strong start and climbing force. 2. Precise Control: The electric bike brushless controller provides precise motor control, significantly increasing motor speed and power. 3. Compatible Motors: The sine wave controller has a stable effect and is compatible with QS in wheel motors or QS medium drive motors, ensuring smooth operation. 4. Battery Protection: The high power controller can effectively protect the battery and extend its lifespan, while increasing the scooter's overall range. 5. Durable Construction: Made of robust ABS and metal materials, the controller boasts high temperature resistance and a strong structure, ensuring long lasting and stable use. Specification: Item Type: Brushless DC Controller Material: ABS + Metal Voltage: 48V to 72V Overvoltage: 91V Low Voltage: 63V Bus Current: 200A Phase Current: 400A Speed: 4500 Number of Polar Pairs: 5 Hall Angle: 120 ° Limit Current: 80A Rated DC Current: 100A Maximum Power: 8600W Magnetic Flux Attenuation: 150% Rated DC Current: 340A Waterproof Grade: IP67 PC programmable support (with supporting debugging software) Function: 1. S mode 2. P mode 3. R mode 4. LIN 5. Temps 6. Theft prevention 7. High Brake 8. Three Speeds 9. CAN BUS 10. Kickstand Default functions of the controller: Hall plug, reversing, 0V low brake, accelerator (0-5V), 12V high brake, ignition, single wire, Hall meter cable, program port, three speed, sports mode, parking, anti theft, charging regeneration, weak magnetic current. EM series controller is a sine wave type controller, which is a weak magnetic brushless DC controller. Generally, it is better to match QS motor. If you want to match a new motor, some parameters need to be tested by yourself. Suitable for 1000-3000W motors. Package List: 1 x Controller3 x Connection Line7 x Screw Note: 1. Professional installation is strongly recommended. Our customer service has instructions and debugging software. If necessary, please contact customer service for it.2. Please read the manual carefully before installation, and it can be adjusted and used with debugging software.