Sapphire glass with anti-reflective coating on the inside Band size 175-215mm Neobrite Case size (length x width x thickness) 51 x 47.8 x 11.3 mm Weight 66 g Case and bezel materials Carbon / Stainless steel Alcantara band Water resistant to 10 atmospheres Time correction Bluetooth: automatic time correction through connection to smartphone Power source and battery life Tough Solar (solar recharging system) Mobile Link function (function linkage via Bluetooth communication with compatible cell phones) Application Compatible with "casio watches Application Link Function Automatic time correction Easy clock setting World time: approx. 300 cities Stopwatch data transfer Time & Place Cell Phone Search World Time World time: 38 cities (38 time zones with automatic daylight saving time setting function) + utc (Coordinated Universal Time) time display, home time city switching function Stopwatch Stopwatch (1/100 second (less than 1 hour)/1 second (more than 1 hour), 24-hour counter, with lap/split function) Timer Timer (set unit: 1 second, maximum set time: 60 minutes, measured in 1-second increments, with warning sound) Alarm 5 time alarms (with warning sound), time signal Lights Double LED light: LED light for dial (with super illuminator, afterglow function, and afterglow time switching (1.5 seconds/3 seconds)), LED backlight for LCD (with super illuminator, afterglow function, and afterglow time switching (1.5 seconds/3 seconds)) Light color LED: white Fully automatic calendar Operation sound on/off switching function Operation sound on/off switching function Power saving function (in the dark, the display is turned off and the hands are stopped after a certain period of time to save power) Battery indication/warning Battery indicator display Running time Driving time without solar power generation from the time of full charge When using functions: approx. 7 months Power saving status: approx. 18 months Accuracy When not linked to a smartphone, the watch operates with normal quartz precision (average monthly difference ±15 seconds). Other Functions 12/24-hour time display switching Hand evacuation function (when the hands overlap with the LCD display and are difficult to see, the hands can be temporarily evacuated from the LCD display) Day of the week display (selectable in 6 languages: English, Spanish, French, German, Italian, and Russian).