The ECO Water Powered Clock is accurate, environmentally friendly, easy to use, and best of all, it's powered by water. A high quality and unique clock that runs itself! br Running 100 on natural power, without batteries, chemicals or anything other than water and a dash of lemon juice. Fill it up for more than six weeks of timekeeping. With its contemporary design, available in a range of bright colours, its ideal for use at home or in the office and ideal as a gift.