The steps to release the speed are very simple, just follow the steps described below.
After turning on the machine, press and hold the ➕➖ keys at the same time to enter the parameter setting, then short press the power button to 08P, short press the power button, the value below flashes, and press the ➕ or ➖ key to adjust the maximum speed value.
This method is also applicable to Burchda U2/RX70/RX20 electric bicycles equipped with YL61C instrument.