Casio’s first G-Shock was a tough little ticker, but it couldn’t do much apart from tell the time. Well, 40 years later, the looks haven’t changed much but what’s inside certainly has. The new DW-H5600 has an optical heart-rate monitor that can also detect your cardio load status and measure blood oxygen, plus a step counter, and sleep-tracking for recovery, with in-depth fitness tracking and analysis powered by Polar. Solar power will help keep the battery topped up for up to a month, or it’ll last nearly a year if you put it in power-saving mode. That turns off most of the features, though, so you won’t be able to do much more than tell the time. It’ll be like 1983 all over again.
from £269 / g-shock.co.uk