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