POWERCAP LED Lighted Hats Combine Patent Pending Ultra Bright LED technology with premium Microfiber ball caps to provide you with the perfect hands free flashlight. The 4 LED's provide more than 48 Lumens and are concealed under the brim so the hat looks just like any other hat until you need to turn them on. When you do click the easy on/off switch under the brim, you'll notice that 2-3mm wide angle LED's are angled down at 25 degrees to light up where your hands are for close up tasks, while 2-5mm narrow angle LED's are aimed forward to light the distance up to 72 feet away. 4 CR2032 Coin Cell batteries are hidden in the sweatband, provide up to 68 hours of life and are easily replacable.