Mobile link functions Time adjustment Easy watch settings World time for about 300 cities Daily alarm settings Phone Finder Tough Solar Dual dial world time 2-city simultaneous display 1-second stopwatch 100-meter water resistance Date display Day indicator 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.