Along with being the most advanced of the classic “square” 5000-5600 series, the G-Shock DW-H5600 is also one of the most advanced G-Shock watches overall, with an MIP LCD display and fitness features such as an optical heart rate monitor, step counter, and accelerometer. Powered by training analysis by Polar, the DW-H5600 measures cardio load status, blood oxygen level, calories consumed with the type of energy sources used (carbohydrate, protein, and fat), and sleep with recovery status. The activity log with auto start and pause records up to 100 runs and the life log records daily step count data. The watch has support for four activities, including walking, running, gym workouts, and interval training. The DW-H5600 is also equipped with a Bluetooth smartphone link and is rechargeable by wired USB cable and solar-assisted charging. The DW-H5600EX-1JR is a limited 40th Anniversary edition that includes a hybrid stainless steel bezel and a second (resin) bezel and band set. The drafting line design of the DW-H5600EX-1JR is inspired by the original DW-5000C drawings and the replacement bezel and band set features the wiring diagram of the original G-Shock module.