CASIO G-SHOCK GM-2100B-4ADR

The CASIO G-SHOCK GM-2100B-4ADR is an analog-digital watch with an octagonal, metal-covered bezel. A "dark gray ion plated bezel" and a "red dial" are featured on this specific variant. 

Core specifications

• Case size (H x W x D): 49.3 × 44.4 × 11.8 mm, according to Casio Malaysia.
• Weight: 72 g.
• Case and bezel material: Resin and stainless steel.
• Band material: Resin.
• Water resistance: 200 meters (20 bar).
• Glass: Mineral glass.
• Shock resistance: Yes.
• Power supply: Two SR726W batteries with an approximate life of three years.
• Accuracy: ±15 seconds per month. 

• World Time: The watch can display the time in 31 time zones (48 cities).
• Stopwatch: It has a 1/100-second stopwatch with measuring modes for elapsed time, split time, and 1st–2nd place times.
• Timer: A countdown timer can be set for up to 24 hours.
• Alarms: The watch is equipped with five daily alarms and an hourly time signal.
• Lighting: It has a Double LED light with a Super Illuminator feature for both the analog face and the digital display.
• Hand shift feature: This function temporarily moves the watch hands to provide an unobstructed view of the digital display.
• Auto calendar: A full auto-calendar is pre-programmed until the year 2099.
• 12/24-hour format: Both 12-hour and 24-hour timekeeping formats are available.
• Tone on/off: Button operation tones can be turned on or off.