G-Shock GDB500-1 Watch. A compact G-Shock in a boldly straight-forward design that moves style into the future. Resin case, band and bezel material. Shock resistant. 200-meter water resistance. Bluetooth: connects to a smartphone and automatically adjusts the time. Approximate battery life: 2 years on CR2016. Step count measurement: 0 to 999,999 steps. Dual time (home time swapping). Countdown timer. 5 daily alarms. LED backlight (Super Illuminator). LED: White. Full auto-calendar to year 2099. Mute feature: Button operation tone on/off. Energy saving feature: Power saving on/off. Low battery alert. Accuracy: +/- 15 seconds per month (with no mobile link function). Imported.