2. Buttons:
Part 2: Instrument functions
1.On/Off function:
In the shutdown state, long press the [M] to start the E-bike;
In the power on state, long press the [M] to turn off the E-bike.
2.On/Off headlight function:
In the power on state, short press the [Headlight] to turn on the headlight.
Then short press the [Headlight] again to turn off the headlight.
3.PAS class and mileage switching:
In the power-on state, short press the [ + ] to increase the PAS level, and short
