Daily Alarms: Each will sound every day at the time you set, Hourly time signal: The watch beeps every hour on the hour months on rechargeable battery (operation period with normal use without exposure to light after charge) With a push of a button, hands are moving and permit a free visibility of functions like stopwatch or date. Perfect for free diving without scuba gear: the watch is water resistant up to 20 bar according to ISO 22810. The watch is equipped with energy-saving Bluetooth® technology, which offers power-saving data transfer at the push of a button. The watch can connect to a smartphone wirelessly via Bluetooth®, enabling access to a wide range of useful functions.

Invisible solar cells in the watch convert light into energy and supply all functions. A rechargeable battery provides the necessary capacity for operation in poor light conditions.On a full charge, the watch can operate for about seven months with normal use without further exposure to light, or up to eighteen months when stored in darkness with power-saving enabled. Regularly exposing the watch to bright light will provide maintenance-free operation for many years. We suggest keeping Tough Solar watches charged up as much as possible and not letting them go to low often, for the health and longevity of the rechargeable battery. The Bluetooth link provides enhanced features through the Casio smartphone app, such as automatic time adjustment (4 times a day), easy watch setting, approximately 300 world time cities, a time & place memory log function, a reminder function, and the phone finder function. (The watch can also be adjusted and operated without using Bluetooth at all.) One notable difference from the GA-2100 is that the subdial indicator on the GA-B2100 shows the function modes and battery level rather than the day of week. The day of week can be displayed on the LCD display along with the seconds. (The LCD display can also display the date with seconds or the hours and minutes with seconds.) For fans of precision: the countdown timers help you to remember specific or recurring events by giving off an audible signal at a preset time. They The time can be set to the nearest second and up to 24 hours in advance. Approximately 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge) time zones (38 cities + coordinated universal time), city code display, city name display, daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping

CASIO WATCH+ World Time lets you select from among approximately 300 cities as the World Time City, Displays the current time in major cities and specific areas around the worldStopwatch /Chronograph - 1/1 seconds, 24 hours - 1/100 seconds 1 hour - Elapsed time - Split times - Lap times Alternatives: The deluxe GM-B2100 is a full metal version. The more affordable GA-2100 offers the same style but without solar power and Bluetooth. Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments) Our quotes are based on historical sales and real-time market data allowing us to give fair prices without all The button tones on the mode button can be switched off for discreet operation. Pre-set alarm or timer functions remain active.