There is a self-test function to check that the car itself has no quality problems. Using one switch to turn on/off, quickly detect safety and convenience. The detection effect is more intuitive, through the transformation of the circular arrangement of lights, distinguish brushless controller is 120 degrees or 60 degrees phase angles and the fault of the brushless controller. Built-in industrial-grade chip, anti-statics, strong anti-electromagnetic interference, low-temperature resistance. Suitable for 24V/36V/48V/60V/72V two-wheeled or three-wheeled electromobiles., Weight: 0.2645547144 Pounds, Manufacturer: Htuteyy