IST Diving signaling 2 in 1 strobe & led torch waterproof water-resistant Compact LED dive torch offers separate strobe at one end, toggle lock lanyard included Strobe rated for 24 hours of continuous use Rated waterproof to a depth of 130 Feet (40m) Operates on 3 AA batteries 2 x 2 x 6 inches (5.08  5.08 x 15.24cm)