The G-Shock GAB2100-2A Bluetooth Solar 'CasiOak' is a blend of advanced features and durability. With a compact size and weighing just 52g, it's lightweight yet tough. Made with a carbon/resin case and bezel and a resilient resin band, it's shock-resistant and water-resistant up to 200 meters. Powered by Tough Solar technology and featuring Bluetooth® connectivity, it offers reliable operation and wireless linking. Its features include world time, stopwatch, timer, and alarm functions, along with a double LED light for enhanced visibility. With ±15 seconds per month accuracy and a hand shift feature for unobstructed viewing, it's a reliable companion for any adventure. - 48.5×45.4×11.9mm Case Size - 52g Weight - Carbon/Resin Case and Bezel　 - Resin Band - Shock Resistant - Carbon Core Guard structure - 200 Meters Water Resistant - Tough Solar (Solar powered) - Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®) - Mineral Glass - World time: 38 time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping - Stopwatch - Timer - Alarm/hourly time signal - Double LED light *LED light for the face (Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) *LED backlight for the digital display (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 - Power Saving (display goes blank to save power when the watch is left in the dark) - Approx. battery operating time: *7 months on rechargeable battery (operation period with normal use without exposure to light after charge) *18 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 (with no mobile link function)