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Securely attaches to , hat or helmet with adjustable strap. and are Water Resistant. Requires 3 AAA batteries (not included) on the .

https://en.wikipedia.org/wiki/Headlamp

https://en.wikipedia.org/wiki/Headlamp_(outdoor)

https://en.wikipedia.org/wiki/Headlamp_washer

https://en.wikipedia.org/wiki/Headlamp_flashing

Volcanoes and volcanology | Geology

Dictionary.com’s List of Every Word of the Year …