100% Acrylic Perfect Gifts Idea-Winter warmer LED knit hat can fit most head sizes for men, women. Comfortable, warm, and washable. The LED light inserted into the beanie hat contains four (4) bulbs and is easily removable. With three (3) adjustable brightness settings. 120 Lumens and up to 4 hours of continuous use or 68 hours of realistic intermittent use. Rechargeable Unisex knitted hat with 10 hours of runtime on a single charge.