Casio G-Shock Wristwatch Metal-covered Equipped Bluetooth Tough Solar Made Biomass Plastic Model GBM-2100-1AJF Men Black.

Since its release in 1983, the tough watch G-SHOCK has continued to evolve in pursuit of unyielding strength. This model features the slim size characteristic of the 2100 series while incorporating smartphone link and tough solar technology. Retaining the octagonal form of the 2100 series, the metal bezel model GBM-2100 is available in three colors: classic black, and blue and green with vapor deposition coating. The band is made from biomass plastic, making it environmentally friendly. It is suitable for a wide range of settings, from casual to business. The GBM-2100 model balances toughness and design with enhanced functionality. - Shock-resistant structure - Tough solar (solar charging system) - 20-bar water resistance - Mobile link function (functionality linked via Bluetooth® communication with compatible smartphones) - Hand retreat function (hands can temporarily move away from the LCD display for better visibility) - World time: time display for 38 cities (38 time zones, automatic daylight saving time setting) + UTC time display, home time city swapping function - Stopwatch (1/100 second for under 1 hour / 1 second for over 1 hour, 24-hour measurement, lap/split included) - Timer (set unit: 1 second, maximum set: 60 minutes, measured in 1-second increments) - 5 time alarms and hourly chime - Battery indicator display - Power-saving function (display turns off after a certain period in dark conditions to save power) - Full auto calendar - 12/24-hour format switch - Operation sound ON/OFF switch - Date display (month/day switch) - Day of the week display (switchable in six languages: English, Spanish, French, German, Italian, Russian) - Double LED light: LED light for the dial (super illuminator, afterglow function, afterglow time switch (1.5 seconds/3 seconds)), LED backlight for the LCD (super illuminator, afterglow function, afterglow time switch (1.5 seconds/3 seconds)) - Operating time without solar power: approximately 7 months with functionality used from a full charge; approximately 18 months in power-saving mode. If not linked to a smartphone, it operates with standard quartz accuracy (average monthly difference of ±15 seconds).