Acer ES 5 Serie Manual Del Usuario página 10

WARNING! When hard braking, you risk serious injury due to loss of
traction and falls. Maintain a moderate speed and look out for potential
hazards.
USE
Keep one foot on the board and one foot on the ground. Immerse yourself
with your foot on the ground, when the speed reach to 3km/h start
accelerating. Keep another foot on the board and accelerate appropriately
or maintain a certain speed. This action is necessary to start the march,
for your safety.
CONSTANT SPEED
If you keep the accelerator pressed, the speed will be fixed, for greater
comfort of travel. To cancel this function please activate the brake.
Look for the equilibrium posture to circulate constantly:
EN-8