Gerber 31-000336 TX 4.0 Flashlight, White LED High lumen output; Regulating circuitry for improved battery efficiency Ultra narrow optic design yields improved beam distance visibility Body built with anti-roll design Lanyard hole designed for 550-para cord; Water resistant Overall length: 7-7/8-Inch; Weight 10-ounces; Run time 8-hours; Uses 3 AA batteries