Casio General x POP ft. Mini Calculator Men Casual Rectangle Water Resistant Watch CA-53WB-3B CA53WB CA53 CA-53 CA-53WB Experience nostalgia and functionality with the CA-53 watch, inspired by the classic 1972 Casio Mini calculator. Featuring a calculator-style LCD display, full keypad, and retro-modern design with green text and a red mode indicator, this timepiece tells time and performs calculations. It also includes dual time, a stopwatch, and an alarm, all in a sustainable bio-based resin band for a stylish, eco-friendly accessory. Module / Movement 3208 (quartz) Battery Life / Accuracy Approximately 5 years (+/-15 seconds per month) Crystal Resin glass Light Nil Case / Band Material Resin case with bio-based resin band Water Resistance Water resistant Case Size Thickness: 8.2 mm Diameter: 34.4 mm Length: 43.2 mm Other Specifications Casio General x POP ft. Mini Calculator Dual time 1/100-second stopwatch (up to 24 hours, elapsed time, split time) Daily alarm Hourly time signal Full auto-calendar (to year 2099) Button operation tone on/off 8-digit calculator 12/24-hour format Regular timekeeping (digital display)