Whirlwind C4 - Display and Controls Overview; Button Functions; Gear Selection Options

Whirlwind – C4 – User Manual – P. 7
3. Display Information
3-1. Buttons:
a. Button M: Hold down to turn on/off power;
Single press to change display: trip
mileage/total mileage/running time
b. Button +: Hold down to turn on/off front light;
Single press to increase speed grade
c. Button -: Single press to decrease speed
grade
3-2. Gear Options:
a. Gear 0: Riding without power support
b. Gear 1: Riding with pedal assistance (Speed
12km/h – 7mp/h)
c. Gear 2: Middle Speed (18km/h – 11mp/h)
d. Gear 3: High Speed (25km/h – 15.5mp/h)
Speed
Indicator
Button
Options:
Gear Indicator
Battery Life