The Fast-500 is ideally designed for school zones. This unit is mounted on a dolly and may be easily wheeled into a classroom or office for safekeeping and recharging. this unit is very accurate and the display is very readable at a glance. Not only is the Fast-500 built compact for storage, but it's also built with safety in mind. Small children won't be hidden behind the sign in crosswalks, but the display is large enough to get a driver's attention to slow down.