The Casio G-Shock GBD100-2D Smartphone Link Bluetooth Men’s Watch is the latest addition to the G-SQUAD line-up of sport watches with Bluetooth capabilities that allow connection with a smartphone. This technology links with a smartphone’s GPS for quicker calibration and more accurate distance measurements, it is the next generation of G-Shock watches and the way of the future. However, the watch still maintains its traditional comforts such as a high definition illuminating face for practicality and a soft urethane band material with several band holes to perfectly adjust your wrist.- 58.2 × 49.3 × 17mm Case Size- 69g Weight- Resin/Aluminium Case and Bezel- Resin Band- Shock Resistant- 200 Meters Water Resistant - Approx. battery life: 2 years on CR2032- Smartphone Link feature: Mobile link (Wireless linking using Bluetooth®)- Mineral Glass- World time: 38 time zones* (38 cities coordinated universal time), daylight saving on/off, auto summer time (DST) switching*May be updated when connected to a smartphone.- Stopwatch- Timer- Alarm/hourly time signal- 4 daily alarms with snooze- LED backlight (Super Illuminator): Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow- Calendar: Full auto-calendar (to year 2099)- Mute feature: Button operation tone on/off- Power Saving (Display goes blank to save power 3 hours every day.)- Accuracy: ±15 seconds per month (with no mobile link function)- 12/24-hour format- Flight mode- Regular timekeeping: Hour, minute, second, am/pm, month, date, day- Life Log Data- Daily data display (step count), Monthly data display (running distance)- Training Data (Up to 100 runs, up to 140 lap times per run)- Elapsed time, distance, pace, calories burned