Introducing the new EQB510D-1A, a stylish and function packed watch that includes a Mobile Link Function so you can be sure you are always on time. Mobile Link function (Wireless linking with Bluetooth Smart devices) Requires download of the CASIO WATCH+ app to your phone. World Time dial at 9 o’clock 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. Use your phone to change the distance setting for calculation of speed in the Stopwatch mode. Transfer stopwatch data to a phone to create a log file.