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G-SHOCK has launched another fitness-focused smartwatch, the G-SHOCK DW-D5600, the second powered by Polar Watch.

It follows the Casio G-SHOCK GBD-H2000, which impressed us in our in-depth review, thanks to its data accuracy and breadth of fitness features.

The G-SHOCK DW-H5600 inherits the octagonal design of the original G-SHOCK and celebrates its 40th anniversary. It comes in two alternate bezel designs, the first is completely black, while the second adds colorful bezels to show the DW-5600 circuit board wiring diagram.

At first glance, you’d be forgiven for thinking this retro Casio G-SHOCK, with its MIP LCD display and classic Casio watch face. But the addition of a heart rate monitor means there’s a lot more to it than your average digital watch.

> We are very excited about the upcoming smart watches

CassioCasio G-Shock DW-D5600

The heart rate tracker is powered by Polar, which provides data on run index, cardio load, energy sources and nighttime recharge.

It also makes sense of the monitored heart rate data during one of G-SHOCK’s exercise modes.

But this model is not as fitness-focused as the GBD-H2000. There’s no built-in GPS, but it ditches your paired smartphone.

And there are only four types of exercise: running, walking, gym workouts, and interval training.

All of this is measured and recorded in the G-SHOCK app, which was our main point of criticism with the GBD-H2000. However, while many improvements can be made to the app, it doesn’t seem too critical here due to the low focus on sports and athletic performance.

Battery life is estimated to be one week, but it has solar energy capacity, which means that even if the main clock runs out of battery, the time will be displayed. That only requires about two hours of sunlight exposure per week, so it should be achievable.

The G-SHOCK DW-H5600 is available in three models, priced from £269 to £389. US pricing/availability is still TBC.