Zaoniy 12-inch Metal Math Wall Clock, Unique Wall Clock Modern Design Novelty Maths Equation Clock,Each Hour Marked by a Simple Math Equation (Black)

Great looking but very very very very delicate, be careful and handle with extra care. Gift to my daughter and she loved it.

The face is made of a mylar/paper type of material. On multiple sides it had curled up. Nothing a bit of glue couldn't fix.

I received this as a birthday gift. When I put it on my office wall, I received lots of compliments. Unfortunately, it's terrible at its core function -- keeping time. Within a week, I noticed that it's off by several minutes. Being a math nerd that I am, I actually measured it: it's slower than actual time by about 45~50 seconds every day. That's a huge inaccuracy for a quartz clock. It means that I need to adjust the clock every week, otherwise it would be 5 minutes slower. Unacceptable.

Perfect gift for math lovers!