Apex Extreme 550 Lumen LED Headlamp - BlackThe waterproof Apex Extreme is designed to take cold weather explorers, cyclists, climbers, and backpackers to new heights.The Apex Extreme provides the same great user interface and output as the Apex, the pinnacle of our Professional Series headlamps, but stores its batteries in a remote enclosure that can be clipped close to your body for optimal battery warmth and usage in cold temperatures. In addition, the external battery pack reduces the weight on your head.Having the longest burn time of the Professional Series, the Apex Extreme is perfect for winter months when the nights are longer and the temperatures are dropping.Features:Power: 550 LumensLamp: 1 Maxbright LED (regulated), (dimmable) 4 White Ultrabright LEDs (regulated), (dimmable)Burn Time: 200 hoursBatteries: 8 AA Alkaline or LithiumWater Resistant: IPX7Weight: 14.7oz / 416gWARNING: This product can expose you to chemicals including BISPHENOL A (BPA) which is known to the State of California to cause birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.