Product Description

Water Power calculator is an innovative product using water as energy for digital time and for the calculate 1.Simply pour water into the tank of the waterbattery( about 3/4 full). (Note: use the tap water can fit for it) *****’s it!. Work like any other clocks operate using dry cells (batteries). 3.Water could last for weeks. Just refill until the water level is low. The garentee of the water battery is one year, but in fact it can use more time . ***** advantage of this product is :it , s not produce waste material, good for the environment And you can use it until the end life of the water battery . we have different models welcome to contact us.