Immerse yourself in the sophisticated shine of the GMC-B2100Y, a full-metal 2100-style chronograph that inherits the legacy of the first-ever G-SHOCK.

We take it way back with the octagonal bezel design of the original DW-5000C from 1983, but rendered in metal with stainless-steel case and bezel. 

Buffering components made of fine resin are installed between the bezel and the case for a shock-resistant structure with a full-metal exterior. The bezel — formed three-dimensionally in a time-intensive forging, cutting, and polishing process — is finished beautifully with a circular hairline treatment on the top surface and mirror polish on the slopes.

The indexes and inset dial rings, treated with a sophisticated vapor deposition finish, showcase refined detail, thanks to delicate molding achieved with fine processing technology.

The band is made with soft, comfortable silicone, with a top surface protected by urethane film for enhanced abrasion resistance. The underside of the transparent urethane features a gunmetal vapor deposition finish, while the hairline-finished surface beautifully complements the full-metal case.

High-density mounting keeps the module slim, while still providing the advanced functions you love in a compact profile and comfortable fit.

Pairs with a smartphone via Bluetooth®. Simply tap into the dedicated app for precision timekeeping that keeps you on track. With Tough Solar, a high-brightness LED light, and a range of other convenient functions, this is a timepiece that delivers both superior style and practical utility.

• Case / bezel material: Stainless steel
  
• Tough Silicone Band (Resin Band)
  
• Mineral Glass
  
• Screw Lock Crown
  
• Neobrite
  
• Shock Resistant
  
• 200-meter water resistance
  
• Tough Solar (Solar powered)
  
• LED light (Super Illuminator)
  
• Afterglow
  
• LED:White
  
• Mobile link (Wireless linking using Bluetooth®)
  
• Dual time (Home City time swapping)
  
• 1/100-second stopwatch
  
• Measuring capacity: 23:59'59.
  
• Measuring modes: Elapsed time, split time
  
• Countdown timer
  
• Measuring unit: 1 second
  
• Countdown range: 24 hours
  
• Countdown start time setting range: 1 minute to 24 hours (1-minute increments and 1-hour increments)
  
• Daily alarm
  
• Battery level indicator
  
• Power Saving (hands stop to save power when the watch is left in the dark)
  
• Full auto-calendar (to year 2099)
  
• Regular timekeeping:
  
• Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (mode and battery, dual time/stopwatch/countdown timer/alarm hour and minute, day)
  
• Day indicator
  
• Regular timekeeping:
  
• Analog: 3 hands (hour, minute (hand moves every 10 seconds), second), 3 dials (dual time hour and minute, dual time 24-hour, day)
  
• Accuracy: ±15 seconds per month (with no mobile link function)
  
• Approx. battery operating time:
  
• 5 months on rechargeable battery (operation period with normal use without exposure to light after charge)
  
• 18 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
  
• Size of case : 51.3 × 46.3 × 12.4 mm
  
• Total weight : 108 g