Brake type: low level. Apply the brake, turn the handle to the bottom, energize and wait for 3 seconds – soft start (default is hard start) with memory function, repeat the above operation again to switch to hard start. Invisible single/double hall booster. Apply the brake, turn on the power, turn the rotary knob three times – Dual Hall Booster (default is Single Hall Booster) with memory, repeat the above operation again to switch. Note: It can only match the three-wire booster sensor. When the battery voltage falls to the under-voltage value of the controller, the output will be stopped automatically to protect the battery in time and prevent the battery pack from being damaged due to over-discharge. Start-up anti-flying and running anti-flying. Prevent the controller from powering on and flying due to line or turntable failure, improve the safety of vehicle use. MOS tube short circuit protection. Automatically detects MOS tube faults when powering on, preventing other MOS tubes from being damaged by series short-circuit. High temperature protection. When the temperature of the controller itself is too high, it will automatically reduce the output current or stop output. When the motor blocking rotation, the control cap automatically limit current, blocking rotation 2S catty cut off the circuit, timely protection of the motor and controller. 1 Brushless motor controller.