BASIC INFORMATION Case size (L× W× H): 52.4 × 48 × 12.7 mm Weight: 65 g Case / bezel material: Stainless steel Water resistance: 100-meter water resistance Power supply and battery life: Approx. battery life: 2 years on CR2016 Mineral glass Resin Band SMARTPHONE LINK/APP CONNECTIVITY FEATURES Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®) Apps: CASIO WATCHES Auto time adjustment Easy watch setting Approximately 300 world time cities Stopwatch data transfer Schedule timer Phone finder WATCH FEATURES World time 38 time zones (38 cities + coordinated universal time), daylight saving on/off,  auto summer time (DST) switching, Home city/World time city swapping Stopwatch 1/1000-second stopwatch Measuring capacity: 00'00''000~59'59''999 (for the first 60 minutes) 1:00'00''0~23:59'59''9 (after 60 minutes) Measuring unit: 1/1000 second (for the first 60 minutes) 1/10 second (after 60 minutes) Measuring modes: Elapsed time, lap time Timer Countdown tim