Casio's new GBX-H5600 watches with MIP LCD and optical heart rate monitor launch in the US

Casio's G-Shock GBX-H5600, which is the first G-LIDE watch with a built-in heart rate monitor, is now available in the US. They are arriving alongside the new MTPB135D series watches. The GBXH5600-1 (black) and GBXH5600-2 (blue) are both listed on the US G-Shock site at $330 each.

The GBX-H5600 gets optical heart rate monitoring and fitness tracking of the DW-H5600, alongside the advanced tide and moon functions that are the cornerstone of the G-LIDE line — two parts of Casio's lineup that have run in parallel until now. Both models feature a translucent bezel that also comes with G-LIDE models, and a solid band — black on the GBXH5600-1 and blue on the GBXH5600-2.

On the fitness side, the watch carries an optical heart rate sensor and accelerometer with training analysis powered by Polar Electro's algorithms. It tracks running, walking, gym workouts, and interval training, and logs cardio load status, blood oxygen levels, sleep recovery across six stages, step count, calories burned, and breathing exercises. Activity data syncs to the Casio Watches app via Bluetooth, which also unlocks tide data from around 3,300 surf spots globally.

The case is built from bio-based carbon and resin. There's a carbon fiber-reinforced case back that makes the GBX-H5600 about 12 grams lighter than a DW-H5600 at just 47 g. It measures 51.1 × 44.5 × 17.3 mm and features a high-contrast MIP LCD. Water resistance is rated at 200 meters. Power comes from a combination of solar-assisted charging and wired USB — solar handles timekeeping, while the heart rate and fitness functions may need wired top-ups.

Both models are available now at gshock.casio.com.

Alternatively, you can check out the Casio GBX-100S-1 on Amazon.