Here is your new favourite watch. See our Casio G-Shock GBD100-1D Smartphone Link Bluetooth Step Tracker that will get you through your day. This range of Casio watches are unique as they link with the GPS of a smartphone for a more accurate calibration of distance measurements that can assist daily health management and running endurance. Not only does this watch feature innovative technology, but it maintains the comfort needs from an everyday watch. The band is made of soft urethane, with many adjustable holes, and the Super Illuminator face illumination ensure that information is always easy to read. - 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 - Sensor feature: *Training Function - G-SHOCK MOVE - 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 - Energy saving feature: 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 - User profile creation - Vibration on/off - Sensor feature details *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