The Headlamp comes with 3 AAA batteries to power it on, so no worries of purchasing anything extra once you get the package. I like that it is adjustable to fit your head and keep a secure hold tight as well. So if your doing Any activity That requires movement, than the product securely Would you hold your head without feeling loose and falling off.
The light is bright enough, that 'if you accidentally turn it on facing yourself, you will notice as I've already how blinding it year-have be! HOWEVER, for a single Headlight / Flashlight for outdoors or in this is really a brilliant one.
I received this product free of charge for an honest and Unbiased Review.