This is the UK SL3 eLED (L2) High Intensity 425 Lumen Secondary Scuba Diving Light Features: Twist ON/OFF bezel sealed with two O-Rings for reliability Reliable double o-ring waterproof seal Beam produces a bright center spot with low level peripheral lighting Stainless steel loop on end of light can be clipped to BC accessory snap clips Low maintenance corrosion proof ABS and Polycarbonate housing Lanyard included Proudly made in the USA The UK SL3 (L2) eLED dive light will give you the most lumens for your dollar. Take it with you on vacation to look under ledges and into cracks along the wall or use it as a back-up or secondary light for more advanced diving at night or into wrecks and caves. It is powered by 3 disposable alkaline c-size batteries so you do not have to worry if it has been charged and it works where electricity is not always available.