Wasser trieb Calculator

SN-747 Water Poweredcalculator Now we used our new water battery which can be used more than 3 years, and we have the patent of the water powered product in China,USA,Eourpe ,Kapan and so on.Now in the marker have some other water powered product is the copy and only be used 1--3 month was designed in 2008, loved by the customer It suitable for put in the tables,.It,s the good choice to do as the gift .for school children,shop and office people. size/pcs size/boxNu./boxnet/gross weight170*130*30mm 600*328*310mm50PCS10.10/11.67KGS