Stainless steel watch with slide-rule bezel featuring blue dial with chronograph functions and date window at three o'clock 43 millimeters stainless steel case with antireflective-sapphire dial window Japanese quartz movement with analog display.All Reset:When the watch does not work properly, you can reset all the settings. If the power reserve is insufficient, charge the watch first. Leather-synthetic band with buckle closure. Operating temperature range is -10°C/14°F~+60°C/140°F Water resistant to 666 feet ; Functions - H800, Synchronized to Atomic Time Clock for Superior Accuracy, Atomic Timekeeping Technology with Synchronized Time Adjustment Available in 26 Time Zones, 1/20 Second Chronograph Measures up to 60 Minutes, Perpetual Calendar Kindly refer the troubleshooting video for changing the date and time.