Casio Men's EFR-545SBPB-1BVCF Edifice Tough Solar Black Watch

The EFR545 series of timepieces are powered by light via Casio’s Tough Solar technology. Their rechargeable battery life is approximately six months on a full charge without further exposure to light. These solar battery-powered timepieces can be charged even in low or fluorescent light, eliminating the need for continuous battery changes. In addition, Casio’s new EFR545 series of timepieces come equipped with a 1/5th second chronograph, tachymeter, 12/24 hour sub-dial, and are water resistant up to 100 meters and also feature a low battery alert.