This is the ScubaPro NOVALIGHT 850R WIDE Scuba Dive Light Features: Rugged gun-metal aluminum body offers a stealthy tech" look while providing lightweight long-term durability. Ultra-wide 80-degree beam is ideal for night diving applications. Interchangeable light head is equipped with a CREE XML U2 LED. 850-lumen output ranks among the best in its class in illumination. Two modes: 100% and 50% power. Light measures 5in/127mm in length. Double O-ring seals ensure watertight integrity. Diamond-shaped knurling on both handle and light head guarantees a firm grip, with or without gloves. Easy twist on/twist off activation allows for trouble-free operation, regardless of depth. Shock-proof rubber protection keeps the light head safe from knocks and bumps. Over-pressure valve releases battery off-gassing - a safety feature not normally found on dive lights at this price point. A depth rating of 1000ft/300m ensures worry-free lighting in virtu- ally all diving conditions. Powered by a single 18650 Lithium-ion rechargeable battery (not included) that provides up to 2.5 hours of burn time. This compact rechargeable light throws a powerful, super-wide beam that's guaranteed to light up the night. "