Overview: Model: Ultra Fire C1 Features a Cree XR-E Q5-WC LED emitter Powered by 2 x 3.0V/3.6V CR123A or 1 18650 battery Accepted voltage input range: 3.7V~12V Single-mode tailcap clicky switch 230 lumens maximum brightness (manufacturer rated) Circuit current output: 800m A (manufacturer rated) Continuous runtime: 3 hours (manufacturer rated) Regulated driver circuitry Glass lens with aluminum textured/OP reflector Comes with a mounting clip Specification: Dimensions: 5.2 in x 1.24 in x 1.01 in Weight: 3.95