Featuring ultra bright T100 tritium markers that will glow for up to 50 years, this watch offers up to four times more visible brightness than a standard tritium illuminated watch. To ensure uninterrupted service, the watch is powered by a reliable Ronda 715Li movement with a 10-year lithium battery. When your adventure involves water, this watch is ready to accompany you diving down to 200 meters. Constructed out of lightweight carbon fiber reinforced polycarbonate and scratch resistant sapphire crystal, the watch weighs in at only 3 ounces. Plus, the included silicone strap provides the utmost in comfort and adaptability.