Set with luxury gold plated detailing, this G-Shock GSTB500BD-1A9 Stay Gold Men’s Watch is a true standout. Its combination of black ion-plated stainless steel and shock-resistant resin provides you with the best style and performance. Enjoy a vast range of digital features that can be upgraded with smartphone connection, including word time and automatic time adjustment. - 46.6×48.9×12.8mm Case Size - 143 g - Resin/Stainless steel Case and Bezel - Stainless Steel Band - Carbon Core Guard structure - Shock Resistant - 200 Meters Water Resistant - Tough Solar (Solar powered) - 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 - 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)