Super Power Output: Ultra powerful XHP70 headlamp flashlight 1 x XHP70 LED > 2 x XHP50 LED > 4 x XML-L2 LED > 6 x XML-T6 LED Most powerful headlamp3 Lighting Modes: High / Low/ Strobe Brightness at high mode can be up to 10000 lumens High mode last about 3 hours AS this is a high power (30W) headlamp Power Source & Power bank: If the switch doesn't work, it means that the battery power if not enough to activate the headlamp Please fully charged THREE batteries at least 12 hours before using 20% power in the battery for security transportation is not enough to activate this 6V big power headlamp Rechargeable headlamp led comes with 3 x 2800mAh 18650 batteries and 1 x USB charging cable Output interface has power bank function for emergency Zoomable LED Headlight: Zoom in the headlamp flashlights as flood light and zoom out for long distance Powerful headlamp aimed for different works purpose Durable & Comfortable: Super bright head torch made by durable aircraft-grade aluminum and designed with water resistant and shock resistant With adjustable and elastic head band for conveniently to put on or take off