With its significantly smaller size and construct this new minimalist GDB500-1D model is smaller and thinner than previous G-SHOCK models. The new addition to the G-SHOCK lineup is a minimalist design made with miniaturized technology that eliminates waste and offers a futuristic image. Take the case size into consideration, the height comes in at 46.3mm and thickness 11mm a more compact make. This model comes with Bluetooth® and STEP TRACKER capabilities. This timepiece embraces the toughness that G-SHOCK has had since 1983. - Module No. 3552 - 46.3 x¬ 41.5 x¬ 11.0mm Case Size - 45g Weight - Shock resistant (G-SHOCK) - LED backlight (Super Illuminator) Auto light switch, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) - Mobile link (Wireless linking using Bluetooth®) - Step Count Tracker - Dual time (home time swapping) - 1/100-second stopwatch - Countdown Timer - 5 Daily Alarms - Hourly time signal - Low battery warning - Power saving on/off - Full auto-calendar (to year 2099) - 12/24-hour format - Button operation tone on/off - Regular timekeeping: Hour, minute, second, year, month, day, day of week - Accuracy: ±15 seconds per month (with no mobile link function) - Approx. battery life: 2 years on CR2016