Casio G-Shock GA-B2100DF-4A Charles Darwin Foundation Solar Bluetooth Watch

A Charles Darwin Foundation collaboration built on the slim GA-B2100 octagon, using bio-based resin for the case and band. Tough Solar power and Bluetooth time sync come with world time, a stopwatch and a double LED light.

• Case material: Carbon / Bio-based resin
• Case size: 48.5 × 45.4 × 11.9 mm
• Weight: 52 g
• Water resistance: 200 m
• Movement: Tough Solar; Bluetooth time adjustment
• Band: Bio-based resin
• Functions: Shock resistant; Bluetooth smartphone link; world time (38 zones); 1/100-sec stopwatch; countdown timer; 5 daily alarms; double LED light; hand shift; full auto-calendar; 12/24-hour format