GRDE 2000 Lumens Zoomable LED Head Torch, Outdoor Waterproof SOS Headlamp with T6 LED, Powerful Rechargeable Headlight for Cycling Running Hiking Camping Hunting Fishing One High Quality LED, max output 2000 lumens, LED lifespan over 100,000 hours. Head torch 90 degree adjustable for wide vision. Head torch power supplied by 2x 18650 batteries, 5 hours working time with wall charger when fully charged. 4 hours working time for High mode ;5 hours for Low mode . Battery compartment can charged by wall/car charger or USB cable (all included), make the charging more convenient. Living waterproof (not for diving); Zoomable (illumination distance 100M); Back indicator LED synchronous with the front main LED (remind the people behind you). 4 Mode: High Light / Low Light / Strobe / SOS Long press the switch button for 10 seconds to "SOS" modeShort press the switch button to "High Light" &gt; "Low Light" &gt; "Strobe" &gt; "Off"