Now producing 350 lumens of light, we've also updated the user interface by adding a second switch for easy lens mode selection. In addition, the improved optical efficiency provides brighter light with more peak intensity, and you can track the battery life with a six-setting, three-LED battery meter. The ReVolt 350 easily spots anchors while you rappel in the dark while its proximity lighting gives you a large area of light for hiking down the trail. Brightness Memory gives you the option to set the light's brightness when first turned on, plus PowerTap™ Technology makes for instant brightness adjustment settings. The ReVolt 350 can run on standard AAA batteries in addition to the included BD 1800 Battery.