G Shock GSTB400GB 1A9 G Steel Data Gemstone Quartz Its genuine black leather strap Its genuine black leather strap not only adds a dash of elegance but also guarantees comfort for prolonged use making it suitable for those who prefer a larger watch The ion plated stainless steel carbon core guard structure accentuates the brushed matt black resin bezel and strap 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