... .Display Function: LED Meter Display function. Mileage, speed, timer, options of speed,vibration alert, the battery level, Over ... modeInertial navigation moduleDisplay functionsLED Meter Display function. Mileage, speed, timer, options of speed,vibration alert, the battery level, ... functions shut down.10): The automatic timer is set for rental operator (10-90 Minutes)11): High-power brushless motor, ...