FirstRank 2100 Lumens Cree XM/L-T6 LED Rechargeable Waterproof Rotating Zoomable Headlamp Headlight (Black K12-B3,with 2x18650 Batteries and AC/Car/USB Charger) 4 Mode: High Light (for outdoor sports, work etc) , Low Light(for outdoor sports, work etc), Strobe(for defense), SOS(for help),. Using Cree XM-L T6 LED, max output 2200 lumens, LED lifespan over 100,000 hours. Living waterproof(not for diving); Zoomable(illumination distance 100M); Angle adjustable(90 degree to adjust). Rechargeable charger design, power supplied by 1 or 2x 18650 batteries(parallel connection, 2 batteries for longer use),Equipped with 3 kinds of charger in US AC Charger and Car Charger and USB Cable,convenient to use in home or outdoor. Battery compartment LED synchronous with the main torch, to remind the people behind you.