Casio - Edifice - Stainless Steel Smartphone Link Dual World Time Watch - ECB-500D-1A - Link with Smartphones - Dual Dial World Time - Mobile link functions: Time adjustment - Easy watch settings - World time for about 300 cities - 5 daily alarms settings - Countdown timer settings - Phone Finder - Tough Solar - Dual dial world time 2-city simultaneous display - Super illuminator - 1/100-second stopwatch - 100-meter water resistance - Hand shift feature - Mobile Link function (Wireless linking with Bluetooth Smart devices) Requires download of the CASIO WATCH+ app to your phone. World Time dial can be set to one of approximately 300 cities around the globe. Home Time and World Time settings (including summer time) updated at a preset time each day. Use your phone to adjust hand positions, set alarm times, and more. Phone finder causes your phone to emit a tone when a watch button is pressed. Mineral Glass - Neobrite - 100-meter water resistance - Solar powered - LED light (Super Illuminator) - Selectable illumination duration (1.5 seconds or 3 seconds), afterglow - Airplane mode - World time: 40 time zones (40 cities + coordinated universal time), city name display, daylight saving on/off, Home city/World time city swapping - Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.) - 1/100-second stopwatch - Countdown timer - 5 daily alarms - Low battery alert - Power Saving (hands stop to save power when the watch is left in the dark) - Full auto-calendar (to year 2099) - 12/24-hour format - Approx. battery operating time: 8 months on rechargeable battery (operation period with normal use without exposure to light after charge) - 26 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) - Size of case:_51.7___48.3___14.6mm - Total weight: 191g - LED:White