Clock Watch materials: The clocks make from better materials and can be used for a long time, waterproof, touch Minis Digital Watchs Small keychain watch, let children or students read time easily at school or during exams Applicability: This keychain digital watch is suitable for students and children Great for kids and students Portable Keychain Pocket watch design is very for you to carry around Keychain watch can be hung on the belt loop or backpack, and practical Digital Watches: Small digital watch is equipped with precise movement, providing accurate time for children