Geek out on the go. Geek out in style. Geek out underwater. The Casio DBC-611G-1D, also known as the Casio Databank 50 Telememo, with its stainless steel band is water resistant up to 30 meters. It has all the added extras you’d expect to find on a watch like this; a stopwatch, alarm, backlight, oh, and of course, a calculator.