Eco-Friendly Water-Powered Clock - Black

Pros: It doesn't use batteries and it doesn't require maintenance. Only water.

Cons: Depending on the angle, the numbers of the display don't appear clearly. The room where you intend to put it must have some light source (natural or artificial).
For instance, in my office, it works well with one 8 W LED light bulb.

Other: It's worth buying it! If you are interested in it, you should bear in mind the lighting conditions of the room and don't forget the angle of the clock. Apart from that, it's a great deal!

Pros: - Works great - Interesting design - It seems to be well resistant - After testing, I removed all the water and he continued working for a few days

Cons: - Too big for some desks - Finishing only reasonable - Could have more functions, such as temperature - No light

Other: Although it appears very solid, the finish it is not the best ... Serves more as a simple gift than as a piece of decor to tell time. I'll buy again to give as a gift.