Casio Edifice EQB1100XDC-1A Smartphone Link/Solar Chrono Mens Watch Black/GreenDespite being a high spec multi hand chronograph with a smartphone link via Bluetooth and being equipped with Tough Solar, which charges even in low light, this model achieves both high functionality and wearability via a thin 8. 9 mm case. It enables functions such as world time, which controls and corrects time via a dedicated smartphone app that is able to select times for approximately 300 cities, and a special stopwatch function that comes in