This G-Shock G-Steel Solar GSTS100G-1B World Time Men’s watch has a tough exterior with an impressive steely look. As much a tool as it is a stylish timekeeper, this watch is full of functionality. Enjoy the practicality of five daily alarms, a stopwatch timer, and vast world time clock. Like any other G-Shock, this steel watch has incredible water resistance and shock resistance to suit any environment. - 59.1 × 52.4 × 16.1mm Case Size - 97g Weight - Resin/Stainless steel Case and Bezel - Resin Band - Shock Resistant - 200 Meters Water Resistant - Tough Solar (Solar powered) - Mineral Glass - World time: 31 time zones (48 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping - Stopwatch - Timer - Alarm/hourly time signal: 5 daily alarms - Double LED light: *LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) *LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) - Calendar: Full auto-calendar (to year 2099) - Mute feature: Button operation tone on/off - Energy saving feature: Power Saving (display goes blank to save power when the watch is left in the dark) - Approx. battery operating time: *8 months on rechargeable battery (operation period with normal use without exposure to light after charge) *19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) - Accuracy: ±15 seconds per month - 12/24-hour format - Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents.) - Regular timekeeping: *Analog: 2 hands (hour, minute) *Digital: Hour, minute, second, pm, month, date, day