Our devices come equipped with a 3-axis accelerometer sensor which allows us to detect vehicle's Rapid Acceleration, Rough Braking, and Prolonged Idle. All three of these issues cause decreases in fuel efficiency and essentially wastes money. Rapid Acceleration can also cause damage to assets which will drop profits as well. Rough Braking puts extra wear on the brakes and dramatically increases the chance of damage to your cargo and the trailer. Prolonged Idle is as it may be expected simply wasting gasoline while not being productive at all.