The revolutionary, battery-powered PowrLiner 3500 72V is equipped with technology that delivers the best stripes with sharp and consistent line quality even on the most difficult surfaces... It was developed to withstand the demands of daily use on parking lots, sidewalks, sports fields and lawns. The perfect mid-range marker for contractors who need a maneuverable, mid-range marker for projects where the use of large machines is not cost-effective. Recommended for medium-sized projects on all park and sports fields.