simple, safe, efficient, high working efficiency, and the effect is good, save you a lot of Cleaning Staff vehicle size (mm) : 1640 x 900 x 1130 highest speed: 8.5Km/h highest back speed: 2.4~4.8km/hclimbing ability: 12 °maximum weight: 140kgbattery: 12 V / 33 Ah x 2motor power: 24 V/450Wfull charge trip: 30 to 35 Kmcharger: 230VAC 24V/4A