● Back cover is integrated type design , easy to assemble and maintain. ● Use GEL battery free to maintain. ● Built in charger easy to access to power supply. ● Low gravity design , 4 point design , improve the trucks stability. ● This drive unit have small turning , the motor and brake is very easy to replace. ● Compact design and small dimensions , offer excellent visibility. ● The turning radius and aisle width is very small and which is similar with manual stacker.