The Casio G-Shock GM-B2100SD-1A is the refined full-metal upgrade of the iconic CasiOak series. It packs a stainless-steel octagonal case, sapphire analog-digital module powered by Tough Solar, and Bluetooth smartphone linkall in a slim 12.8-mm profile with improved contrast grey dial and silver accents.
- Stainless-steel case, screw-lock back and bezel
- Full stainless bracelet with one-touch 3-fold clasp
- Case size: 49.8-x-44.4-x-12.8-mm; weight: 165-g
- Mineral glass crystal
- Carbon Core Guard-protected analog-digital module
- Tough Solar power with ~7-mo full / ~18-mo power-save
- Bluetooth mobile link: app sync, phone finder, world time (~300 cities)
- Double Super Illuminator high-brightness LED (dial + LCD)
- Shock-resistant and 200-m water resistance
- Magnetic resistance
- World time, stopwatch, countdown, 5 alarms, hourly signal
- Full auto-calendar to 2099; 12/24-hour format
- Hand Shift feature; button tone on/off; 15-sec/month accuracy
- High-contrast grey dial with silver indices via vapor deposition
- One-year warranty
- Ships with original manufacturers packaging