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