This Casio retro blue calculator watch is perfect for students, travelers, and anyone who loves a touch of vintage style. Use it in the classroom for quick math, during your travels to keep track of different time zones, or in your daily life as a reliable time - keeper. It has a resin case and band with a buckle closure, and it's water - resistant. The watch measures 43.2mm x 34.4mm x 8.2mm and features an acrylic glass. It also comes with useful functions like a stopwatch, daily alarm, and an automatic calendar.