Warn ing: It is illegal to ride electric scooters on public roads, pavements, or cycle paths. They are intended only for use on private land with the owners permission It is highly recommended that you purchase the C set Its super easy to use, and the handle works well with the whole product. Customers who buy A or B sets should pay attention: if 9E error occurs after you complete the assembly, it means that your handbrake and the controller connection line of the set do not match. Please go to the nearby repair shop to find a professional for adjustment, or purchase the handbrake of this link to use together Description: *High-performance 32-bit MCU *Protection function for abnormal conditions such as overvoltage, overcurrent, overheating and undervoltage *Cruise at fixed speed;Brake energy recovery *350W 36V 15A Scooter Controller Board Motherboard with Bluetooth Led Display with APP Hover Board Controller *Suitable for electric scooter complete set system replacement *Speed: The low speed is 152km/h; the high speed is 25km/h (maximum Instruction: 6. Battery display: 33v-36v The first light is long 36v-37v or two lights long bright 37v-38.5v or two lights long bright 38.5v or more, , two, three, four lights Low voltage alarm: The first light flashes when the battery is below 33V, and the buzzer sounds 6 times. 7. Low voltage alarm speed mode: The speed limit is about 15Km/h. When the power