The Nightstick 4708B USB rechargeable adjustable beam headlamp is 1, 000 lumens of powerful LED light. With a waterproof aircraft-grade 6061-t6 aluminum housing, this sleek headlamp is as durable as it is convenient. Use the low-profile ratchet tilt head to place light where needed while adjusting between 4 lighting modes (high/med/low/strobe). charging takes place inside of the light, so the built-in waterproof micro-usb port has a small battery voltage monitor with a red/green LED charging indicator for easy reference. Also included is a 2 foot USB to micro-usb cord along with lithium-ion rechargeable battery.