The MTGB1000BD-1A keeps accurate time anywhere in the world using the Connected Engine module, which connects to a time server via a paired smartphone or using radio wave time-calibration signals. The watch connects to the G-SHOCK Connected smartphone app to enable the user to easily set the world time and alarms from the app. The model also comes with premium features such as G-SHOCK's Multi-Band 6 Atomic Timekeeping Technology, which provides accurate timekeeping virtually anywhere via radio signals from up to six different transmitters worldwide. The MTGB1000BD-1A has a sapphire crystal to protect against scratching, and tough solar technology. The watch comes equipped with standard G-SHOCK technology of 200M water resistance and shock resistance, in addition to dual dial world time (up to 300 cities selectable within the app), a full auto Super Illuminator LED light, stopwatch and countdown timer, daily alarm, and full auto calendar all in a 51mm black ion-plated stainless steel