This Casio retro green calculator watch is perfect for students, travelers, and busy professionals. Students can use it for quick math calculations during classes or exams. Travelers will appreciate the dual - time and second - time - zone features to keep track of home and local time. Busy professionals can rely on the stopwatch and alarm functions to manage their schedules. It has a compact size of 43.2mm x 34.4mm x 8.2mm, making it easy to wear and carry around.