The Bigblue HL-1000 LED Head Light System delivers a stunning 1,000 lumens light output through 2 piece of XML LED and an 120 degree perfectly wid even light beam. The 6500K white light reflects the true vibrant colors of the surrounding while diving. The light built-in 2 pieces Red LED (XW version) to enhance focusing performance. 4 levels of brightness , 1 level of red color (XW version) and SOS controlled by a reliable push button with battery indicator. The 18650 rechargeable Li-ion battery pack comes with a smart charger enabling you to charge the battery in a few hours. The 4 steps power adjustment lets you choose between four output levels - IV at 100%, III at 50% , II at 25% or I at 10% extending the burn time and reducing reflections at close range. Replaceable 18650 Li ion rechargeable battery pack. Head Strap included.