Nitecore SENS AA2 Flashlight features a CREE XP-G (R5) LED, so you get a bright, white light to illuminate the dark. The Nite-Core Sens AA-2 Flashlight has a highly effective current circuit board that enables maximum runtime of up to 37 hours. There are three presetted brightness levels and an active dimming system with auto-adjust function. The soft turn-on mode and low illumination is for everyday usage. This flashlight is equipped with an integrated lens. Constructed from aerospace grade aluminum alloy and type III military grade hard anodizing, you know this flashlight is built for durability. The special-made rhombic knurling allow for a better grip. The Night Core SENS AA 2 Flashlight is waterproof in accordance with IPX-8 (two meters submersible) and also tail stand compatible.