High-intensity LED lasts 100,000 hrs. LED available in white (10 lumens), red (1.13 lumens), blue (.71 lumens), green (2.6 lumens), and ultraviolet (375 nm) Powered by 3 "AAAA" alkaline batteries Runs up to 60 continuous hrs. Momentary blink and constant "on" modes Serialized for easy identification Pocket clip for easy access 6.21" 1.1 oz.