Casio Watch Edifice Bluetooth. The watch can be wirelessly connected to a compatible smartphone via Bluetooth. The energy saving technology enables access to a host of functions. A solar cell provides power for operation. Luminous coating provides long term illumination in the dark after only a short exposure to light. A second location time can be set and called up. Ideal if you frequently make overseas calls. The daily alarm reminds you of events that recur every day, by emitting an audible signal at the set time. At the touch of a button, the watch switches to offline mode. This means that you can disable the wireless or GPS receiver when in the air for the duration of the flight. Perfect for swimming and snorkeling, the watch is water resistant to 100 metres.