Your bike has gears to help you in a mechanical way like setting a comfortable cadence and adjusting the effort needed to pedal. The assist levels help you with this but in an electrically powered way. Here is an explanation on what a pedal assist is.
The Assist levels are basically a portion of the full power the system can give you and they are arranged in a way that you can select in steps.
Note: All of our bikes are configured to follow Federal regulations.
Some of the extra modes are available via settings.
0 - This is basically no power assisting you while riding. It is used to have the system on
ECO - This will give you enough power to take the weight of the bike off
1,2,3 - These are incremental steps on power assist that will cap when reaching 20mph
Sport, S - Will give you full power output having a 28mph cap
Off-Road / Race - This will give you the full system power and won't have a speed limiter. Only to be used where allowed like non-public roads.
To learn about where you can use each setting, review with your local regulations and also read the guide here.