Wasser trieb Calculator

SN-666 Water Poweredcalculator Now we used our new water battry which can be used more than 3 years with 1 year guatantee. And we have the patent of the water powered product in China,USA,Eourpe,Japan and so on. Now in the marker have the other water powered product is the copy and it only can be used 1--3 month.. It not need dry battery only add water in the device can working.And not produce the waster material, good for the environment..When It have no water you only add water when it have a little. It suitable for put in the pocket,.It,s the good choice to do as the gift .for school children,shop and office people.size/pcssize/boxNu./boxnet/gross weight110*76*19mm450*345*280mm100PCS6.00/8.30KGS