The Dorcy 3 LED Cap Light features a unique built-in clip attachment that allows for hands-free use and easy attachment to you cap. This light is lightweight and compact. You will not feel its weight on your cap. An under mounted slide switch provides for easy switching. Its 3 super bright 5 mm LED produce 10000 mcd of output with a 13 hour run time. The LED Cap Light is available with traditional white LED. Comes complete with a CR2016 battery.