This innovative four-LED hat light by Nite Ize is flexible and clips onto nearly any hat or visor's brim, providing hands-free white light without tying up your hands. Constructed of durable, high-density EVA foam, the BrimLit slides right onto the underside of your hat's brim, securely clipping on with two auto-adjusting tension clips while bending to match its curve. One press of the button provides a brighter, more directed light, while another press puts it into a lower-intensity "glow mode". This water-resistant light is great for any tasks requiring you to keep your hands free in dark places... flying, fishing, camping, or making repairs or inspections in tight spaces with poor lighting. Powered by two replaceable 2032 lithium batteries (included). Output: 14 lumens (High Mode) or 8 lumens (Glow Mode). Runs for 8 hours on High Mode or 16 hours on Glow Mode. Measures 6.7 in x 3 in x 1.1 in (169.6 mm x 75.1 mm x 15.3 mm)(flexible), Weight 1.06 oz / 31 g.