Peak Caribbean, Seoul P4 LED, Black Type III HA This light packs more punch than most large handheld lights, but at a fraction of the size (the light measures just over 3", and weighs in at 2.0oz with battery). This light can operate for nearly 5 hours on a single 123A battery, and thanks to currency regulating circuitry it will emit a 130 Lumen beam for the entire burntime. The body is made from a very durable but lightweight Type III Black Anodized Aluminum, and features anti-roll facets and O-ring seals for water resistance. The reflector was designed to provide a very smooth "hotspot" and a significant amount of flood light for lighting up large areas. The tailcap offers an adjustment screw to fine-tune the twist on/off mechanism (the adjustment screw is concealed behind an O-ring sealed screw-in plug). Features Seoul P4 LED capable of producing 130+ lumens 5-hour runtime without loss of light Twist on/off head Polycarbonate Lens O-Ring sealed body Current regulating circuitry CR123 battery (included)