Olight i3T EOS Desert Tan Flashlight is one of the most poplular lights we sell. The i3T has 180 lumen output and uses a common AAA battery. The pocket clip can be used in either direction making it easy to carry in a pocket or on a hat brim. Lightweight, palm-sized aluminum body with anti-slip double helix knurling for unique style and solid grip. Operation is simple with easy tail switch operation for quick mode change from 5 to 180 lumens and momentary to constant on.