Water Powered Electronic Table clock Digital Children Alarm clock Smart led clock with Calendar Christmas gift for kids Product number Product name: Environmentally friendly water energy clock (small) Size: 88*82*77MM Weight: 80g (excluding outsourcing) Service life: more than 3 years Power supply mode: water power supply Color: blue red green grey Product function: time calendar stopwatch ===========Working principle =========== The water energy clock does not need batteries at all, as long as the bottle on the back of the clock is filled with water, the time and date can be clearly displayed, and it does not need to be refilled for several weeks. The source of electricity, water, triggers internal chemical reactions.The chemical reaction is mainly the metal elements in the top 20 of the periodic table, without heavy metals, and harmless to the environment (mainly magnesium and aluminum commonly found in our lives). ===========How to use============ This product can work normally by adding tap water. If the display of the product is dim or disappears, you need to add water or other liquids (except corrosive liquids) until the liquid fills the positive and negative electrodes in the container to work normally. Note: (different types of perfume can be added according to personal preference) MODEL528147179757