Eahora KD986 Owner's Manual page 5

Push-assistance Mode
Hold the "-" button for 2s to activate the push-assistance function and
keep pressing the "-" button to use this function. The E-bike will work at
a constant speed of 6 k m/h under this mode and the screen will show
" ". Release the "-" button to exit this mode.
Do not activate this mode while riding. It could only be
Headlight
Hold the " " button for 2s to turn on the headlight and the LCD
luminance will automatically decrease.
Hold the " " button for another 2s to turn off the headlight.
Headlight On
used when pushing the E-bike.