The Tovatec IFL 660-R 300 Lumens Light features a narrow 7° degree beam for maximum carrying distance. The ergonomic design is constructed from anodized aluminum for rugged durability. Waterproof to 230' (100 meters), this is a light you can take anywhere. Powered by either 2 CR123 batteries (included in packaging) or 1 rechargeable 18650 battery (optional accessory). Also included in packaging is a plastic sleeve spacer to be used with the 2 CR123 batteries. The 300 lumens of brightness is provided by a CREE LED with a 100,000 hour life expectancy. The light has a burn time of 3-hours and when used with the 18650 lithium ion rechargeable battery burn time is 2-hours. The light provides a color temperature of 6000-7000K. Light is sealed by a double O-ring design. The Tovatec IFL 660-R 300 Lumens Light is great as a backup cave or wreck diving light and works well as an everyday recreational dive light. The light measures (L x Dia.) 6.2" x 1.5" (15.75 cm x 3.8 cm), weighs 8.2 oz. (232 g) and has a magnetic slide switch for full power only. Included with the light is a plastic shrouded adjustable wrist lanyard with barrel lock fastener. Light comes with an owner's manual.