Inspired by nighttime training and exercise, this G-SHOCK model GBD100LM-1D was designed with bezels and bands crafted of glow in the dark luminescent resin. Created to stand and be seen even in the dark. The versatility in this watch includes training functions such as accelerometer, distance measurement, and smartphone linking. With the added capability to track your running pace, with additional auto lap function that automatically calculates the time you run a specified distance. Upgrade your daily exercise and workouts with a G-SHOCK that is fit to take on what you take on. - 58.2 x 49.3 x 17mm Case Size - 69g Weight - Case and Bezel Material: Resin - Resin Band - Mineral Glass - Shock Resistant - 200 Meters Water Resistant - Approx battery life 2 Years on CR2032 - Sensor Feature: Display of distance, speed, pace, and accelerometer, auto/manual lap times, Auto Pause, target alert setting (time, calories burned) on/off, training display customization (elapsed time, distance, pace, lap time, lap distance, lap pace, average pace, speed, average speed, calories burned) - Mobile link (Automatic connection, wireless linking using Bluetooth®) Watch Features - World Time – 31 Times Zones (48 Cities) Daylight Saving On/Off - Stopwatch - Timer - Alarm - LED Light: White - Calendar – Full Auto-Calendar (to year 2099) - Battery Level Indicator - Energy Saving – Power Saving (Display goes blank to save power 3 hours every day.) - Mute feature – Button operation On/Off - Accuracy: ±15 seconds per month (with no mobile link function)