Peak Pacific 1xAAA, Seoul P4 LED, Black Type III HA Not enough can be said about the Pacific models from Peak. Like their other models, the Pacific packs a mighty punch in a very small, lightweight package (just over 3" in length, and approx. 1.5 oz with batteries). Not only does it generate 75 lumens, but it can also run for up to 10 hours on a single AAA battery without loss of brightness! The body is made from type III hard anodized aluminum, and features 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 75+ lumens 10-hour runtime without loss of light Twist on/off head Polycarbonate Lens O-Ring sealed body Current regulating circuitry AAA battery (included)