The device has 2 different modes zero-start-mode and non-zero-start-mode.
Zero-start-mode means: You press the throttle and the device starts
Non-zero-start-mode means that you must first push the device with one foot before the device reacts to the operation of the throttle lever.
To switch between the two modes, first turn off the power, then press the on / off button until all 5 LEDs light up 4 times, then the mode is changed.