Math Wall Clock Are you looking for a unique wall clock? Claic design with three hands but with one different- Its hours are marked by simple math equations. To tell the time, you solve for the answer Black and white in color, the wall clock goes with all types of decor and looks as if it the numbers were written on a chalkboard. The face is printed on a 2mm thick Acrylic, and the clock is about 12inch in diameter. Large size. it is easy to read from distance. Powered by 1*AA battery(not include), with quiet & non-ticking sweep movement, provide a good sleep and work environment. We can also custom make any personalized design for you, if you need a custom made design or for bulk orders queries please tell us. Quartz Movement Sweep movement, quiet & non-ticking. The high-quality quartz movement mechanism offers precise time, quiet sweep provide a good sleep and work environment. Easy To Read Different white equation at each demarcation on black background, Black and white in color,it is very clear to read. White hour and minute hands, as well a white second hand will give you an accurate read on time down to the second so you don't need to second-gue yourself. Easy to Hang Wide back slot ensures easy installation, hang on any nail. You can hang it anywhere you wish. It is powered by 1* AA battery.(not incluede) Perfect Decor,Perfect Gift A unique gift for a math teacher engineer, an accountant, a mathematician or anyone else who works with numbers or students. A perfect decor for claroon, office , studio or room. Metal Frame Wall Clock Acrylic Wall Clock Size 12*12inch 12*12inch Frame Metal Frame Without Frame Silent Movement