Voltage/Freuency 220V/50HZ Battery specification 6V/8Ah Power cable length 1.5M Power loss 12W(6V6W*2)/10W Working time 1 lamp for 6 hr. ,2 lamps for 3 hr.,3 lamps for 2 hr. The battery refreshes time Refresh time for the first time﹥24H Later the every time refreshes time﹥15H Essence weight 4.2kg Essence size 270X107X380MM The essence packing size 36.5X11.5X37.5CM A size 48X38X39.5CM Net weight 18.12KG Gross weight 19.05KG Pack the quantity 4pcs 20-feet container 1570pcs 40-feet container 3140pcs