Smith & Wesson M&P7 4.5 Volt XRE-Q3 CREE HD (High Definition) Flashlight . Dimensions are 5.25-Inch in length X 1.25-Inch diameter and includes an integrated pocket clip. This dual mode flashlight provides 276 Lumen of brilliant white light on high beam and 31 lumen output in low beam power saving mode with an amazing battery runtime of 20 hours on high beam mode and 40 hours on low beam. State of the Art CREE LED diode is the latest technology, brightest long range LED on the market. Brilliant white CREE diode lasts forever, no need to replace bulbs. Tactical tail cap switch operates high and low beam function. Fits all standard weapon mounts. 3-AAA batteries included. Lifetime warranty.