Math Wall Clock, Novelty Timelike Unique Wall Clock Math Formulas Clock, Simple Math Equation (black 30cm) The product is shipped based on the color or size of the main image of the product page. HIGH QUALITY MATERIAL - This analog display wall clock made of high quality acrylic material with white letters and numbers, ideal for classrooms or the office. Special Design - The black clock face was designed to look like a blackboard, with each math equation painted to look like white chalk. Instead of traditional numbers, this wall clock has a different equation for each delimitation. Funny Mathematical - The pointer moves around the watch face to indicate the time of day through a different math problem for each hour. A unique and creative way to keep track of time, this wall clock is a fun and challenging brain exercise. If you can read this watch, you are undoubtedly a math geek. Each lesson is marked by a simple math problem. Solve it and solve the riddle of time. Ideal for the budding math student or for anyone who wants something different in a watch. Application - Great for the budding math student or anyone who wants something different in a watch. For classroom, study, living room, nanny bedroom, office. Product Note: Regarding the battery, the battery is not included, please use the carbon-zinc battery, please do not use the rechargeable battery or other batteries, due to the high output current of these batteries, the accuracy of the clock may be affected.Specifications: Material: Acrylic Color black Shape: Round Size: 30 x 30 / 11.8 x 11.8 inches Power: 1 AA battery (not included) Unique appearance and good performance, look fashionable and show accurate time. The watch measures 11.8 inches in diameter, it is easy to see from a distance. A unique and creative way to keep track of time, this wall clock is a fun and challenging brain exercise. Each lesson marked by a simple math equation can overwhelm your fear simply by solving some simple math problems with each corresponding lesson. Great gift idea. Give one of these wall clocks to a math teacher, engineer, mathematician, or anyone who loves straight numbers. A very fashionable decoration for the wall, especially for the classroom, office and study, as well as an ideal gift for your friends or their children. Package Includes: 1 * Math wall clock