[Water Powered Clock]:Electricity is generated through the chemical reaction of water.As long as the bottle on the back of the clock is filled with water,the time can be clearly displayed on the screen [Wide Application]:Digital clock can be placed on the table or in the bedroom,living room,office or other places [Bedside Table Clock]:Retro decoration alarm clock,you can add different kinds of perfume according to personal preference [Product Size]:Bedside clock 8.8cmx8.2cmx7.7cm/3.46inch x 3.23inch x 3.03inch [Instructions For Use]:Desk clock can work normally by adding tap water.If the product display dims or disappears,you need to add water or other liquid at this time until the liquid is full of the positive and negative electrodes in the container and it can work normally