Case / bezel material: Stainless steel Resin Band Mineral Glass Tachymeter Black ion plated case 100-meter water resistance Tough Solar (Solar powered) Double LED light LED light for the face (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration (1.5 seconds or 3 seconds), afterglow) Mobile link (Wireless linking using Bluetooth??) World time 39 time zones* (39 cities coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping *May be updated when connected to a smartphone. 1/1000-second stopwatch Measuring capacity: 00'00''000~59'59''999 (for the first 60 minutes) 1:00'00''0~23:59'59''9 (after 60 minutes) Measuring unit: 1/1000 second (for the first 60 minutes) 1/10 second (after 60 minutes) Measuring modes: Elapsed time, lap time Recorded data: Up to 200 records (measurement lap times) Other: Speed (0 to 400 units/hour) Countdown timer Measuring unit: 1/10 second Countdown range: 24 hours Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments) 5 multi-function alarms (with daily, 1 time, schedule) Hourly time signal Hand shift feature (Hands move out of the way to provide an unobstructed view of digital display contents) Battery level indicator Full auto-calendar (to year 2099) 12/24-hour format Button operation tone on/off Power Saving (display goes blank and hands stop to save power when the watch is left in the dark) Regular timekeeping Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 1 dial (speed indicator) Digital: Hour, minute, second, pm, month, date, day Accuracy: ?ñ15 seconds per month (with no mobile link function) Approx. battery operating time: 6 months on rechargeable battery (operation period with normal use without exposure to light after charge) 19 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) Size of case : 51.5??48??13.9mm Total weight : 100g