The Klarus XT1A Flashlight w/ Dual Button Switch is a compact but extremely bright tactical and self-defense flashlight built for lightning-fast one-handed operation and easy access to the strobe mode, which can be activated even when the flashlight is turned off. This tactical flashlight offers three light levels plus a variable-frequency strobe mode and a maximum output of 150 lumens, powered by a single AA battery. The Klarus XT1A LED Flashlight is built around a XP-G R5 LED bulb with a lifespan of 50,000 hours, so the flashlight will last as long as you do. The Klarus XT 1A LED Flashlight is made for easy operation, with a forward-mounted tactical switch with momentary activation. An attached Clip for makes for easy hands-free operation, and the Klarus XT1A Flashlight is waterproof to IPX-8 Standard (2 meters). This compact tactical light puts put a remarkably smooth beam with a perfect balance of beam throw and spill, its output digitally regulated to keep a constant brightness.