Eahora KD986 Owner's Manual page 6

Assistance-level
Press the +/- button to switch the E-bike system assistance-level
which will also change the motor output power. The default setting
of assistance-level is "0-5". "0" refers to no output power. "1" refers
to the minimum output power while "5" refers to the maximum
output power. The default value is "1" after turning on the display.
Assistance-level Indication
Battery Percentage Indication
The battery power/voltage shows in the five bars. 100% refers to the
battery is fully charged and the battery voltage is on the highest level.
While 0% refers to the battery needs to be charged immediately.
Battery Percentage Indication