Specifications Case / bezel material: Stainless steel Solid Band One-touch 3-fold Clasp Stainless Steel Band Tachymeter Mineral Glass Neobrite Screw Lock Crown Blue ion plated bezel 100-meter water resistance Solar powered LED Light (Super Illuminator) Afterglow Mobile link (Wireless linking using Bluetooth®) Dual time (Home city time swapping) 1-second stopwatch Measuring capacity: 23: 59'59. Measuring modes: Elapsed time, split time Countdown timer Measuring unit: 1 second Countdown range: 24 hours Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments) Daily alarm Battery level indicator Full auto-calendar (to year 2099) Power Saving (hands stop to save power when the watch is left in the dark.) Date display Regular timekeeping Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (day, dual time hour and minute, dual time 24-hour) Accuracy: ± 15 seconds per month (with no mobile link function) Approx. Battery operating time: 5 months on rechargeable battery (operation period with normal use without exposure to light after charge) 22 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Size of case / Total weight Size of case: 49.2 × 45.8 × 12mm Total weight: 148g