This slimmed down version of the G-Steel makes no sacrifices. The GSTB400-1A comes packed with impressive features and functions. Built with a Carbon Core Guard structure to ensure shock resistance, 200 meter water resistance, a mineral crystal, and neobrite indexes. Mobile link uses Bluetooth to set alarms, alert you to incoming calls or emails, adjust to precise time, and find your phone. A double LED light illuminates the face and digital display. World time allows you to adjust time by choosing time zones or city code. Functions include 5 alarms, stopwatch, countdown timer. Features a battery level indicator, full auto calendar , and hand-shift feature. All solar powered.