G-Shock G-Steel GST-B100 Series GST-B100B-1A4

The Bluetooth® connect button, the GSTB100 iconic disk indicator at 9 o'clock, and the G-SHOCK logo are accented with colours that are typical of those seen on high-tech gadgets. Specifications Shock Resistant 200M Water Resistant LED light (Super Illuminator) LED light for the face (Full Auto LED Light, selectable illumination duration, Afterglow) LED Backlight for the digital display (Full Auto LED light selectable illumtion duration, afterglow) World Time 31 time zones (48 cities + UTC), city code display, daylight saving on/off 5 Daily Alarms Hourly Time Signal 1/100 Second Stopwatch Measuring capacity: 23:59'59.99" Measuring modes: Elapsed time, split time, 1st-2nd place times Countdown Timer Measuring unit: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 to 60 minutes (1-second increments, 1-minute increments) Full Auto-Calendar (pre-programmed until the year 2099) 12/24 Hour Formats Button operation tone on/off Accuracy: ? 15 seconds per month Regular Timekeeping Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: Hour, minute, second, pm, month, date, day