OrcaTorch D550 is a small and lightweight tail magnetic switch diving light. It is equipped with a totally sealed magnetic controlled tail switch which offers high waterproofness and easy operation underwater. Using the latest USA CREE XM-L2(U4) LED, max 1000 lumens output and over 5 hours 45 minutes runtime. Featuring * Cree LED, 1000 lumens output * Uses one 18650 battery * Magnetically controlled tail switch offers high waterproofness and easy operation underwater * Standardly included wrist strap fastens the flashlight to the back of your hand * Water pressure resistant construction, depth rated to 150 meters * High efficiency constant current circuit, constant brightness * Reverse polarity protection, to protect from improper battery installation * Over-discharge protection function * Constructed from high-strength A6061-T6 aluminum * Mil-Spec Type III hard anodized finish for durability and corrosion resistance * Two sides coated toughened glass with high water pressure resistance under deep water