The BEANIE has 2 choices - One with 2 x changeable batteries (included) OR the USB Beanie which has a rechargeable battery included and can be charged easily by plugging into any USB port. (see other NiceBuys Listings for brightbrim USB Beanie and brightbrim LED Cap).
BEANIE - one-size-fits-all. Warm. 4 x Powerful LED's. 3 different Brightness settings.