Laulima Metal Craft Hoku Satin Titanium Custom Flashlight 519a 4500k LEDThe Hoku is a user programmable tail switch activated flashlight based on a 10440 (AAA sized) flat or button top 3. 7V lithium ion cell that consists of 3 main components, the body, bezel, and the light engine. To install a battery, grip the body clip section and the center engine section independently and twist them in opposite directions to gain access the battery tube. Includes a custom microfiber pouch Made in the USA by Dragoncut Designs, maker