... .Efficiency: >75% 5.Cetification: 3E The kit includes motorized wheel,motor controller,speed throttle,aluminium battery box,charger,Lithium battery ... 24V8AH or 8Hours/36V 10AH battery packSpeed: 0-4.5kphSuitable wheelbarrow frame:* Heavy duty tubular steel construction* Capacity 6 cubic ... Max Load : 150KGS* Speed : 0~4km/h* Diameter of front wheel: 40cmyou just need to pay for him some procedure fee ...