CASIO MOD. GM-B2100D-1AER

The CASIO G-SHOCK MOD. GM-B2100D-1AER is a robust and stylish men's/unisex digital-analog watch that blends the iconic octagonal bezel design of the original G-SHOCK DW-5000C with a modern full-metal construction and advanced features. It's part of the "Full Metal 2100" series, often nicknamed the "CasiOak" due to its resemblance to a certain high-end octagonal watch design.   

Key features include:

Full Metal Construction: The bezel, case, and band are crafted from stainless steel, providing a premium look and enhanced durability. The case back is a screw-lock type.

Shock Resistance: As with all G-SHOCK watches, it features a patented Hollow Core Guard Structure that protects against impact and vibration.

200-meter Water Resistance: Suitable for swimming and diving.

Tough Solar Power: The watch is powered by light, eliminating the need for battery changes.  

Bluetooth® Connectivity: Pairs with smartphones via the CASIO WATCHES app for features like automatic time adjustment, easy watch setting, world time (approximately 300 cities), time & place log, reminder, and phone finder.

Dual Illuminator: Separate LED illumination for both the analog hands and the digital display ensures readability in low-light conditions.

Mineral Glass: Offers good scratch resistance for the dial.

World Time: Displays the current time in 38 time zones and 38 cities + UTC, with daylight saving on/off and home/world time city swapping.

Stopwatch: 1/100-second stopwatch with a measuring capacity of 24 hours, including elapsed time, lap time, and split time modes.  

Countdown Timer: Measuring unit: 1 second; countdown range: 60 minutes; countdown start time setting range: 1 second to 60 minutes.

5 Daily Alarms: With one snooze alarm.

Hand Shift Feature: Hands move out of the way to provide an unobstructed view of the digital display.

12/24-Hour Format: Digital time display can be configured.

Full Auto-Calendar: Pre-programmed calendar up to the year 2099.

Date and Weekday Display: The current date and day of the week are displayed.

Battery Level Indicator: Shows the current battery charge level.

Power Saving Mode: Saves power when the watch is left in the dark.

Mute Function: Allows for the button operation tone to be turned on or off.

Neobrite: Luminous coating on the hands and sometimes markers for visibility in the dark.