Streamlight ProTac 2L-X Mid Size Flashlight - It produces 500 lumens and provides you with dual fuel versatility, as it accepts either one Streamlight rechargeable 18650 battery or two CR123A lithium batteries. Features: Choice of three operating modes: 1) high/strobe/low, 2) high only, 3) lowithhigh Removable pocket clip Anti-roll head prevents the light from rolling away when placed on a flat surface Gasket-sealed glass lens Durable anodized machined aircraft aluminum construction DUAL FUEL: Uses two CR123A lithium batteries (included), also accepts one Streamlight rechargeable 18650 lithium batter TEN-TAP, programmable switch for user selectable operation IPX7, waterproof to 1m for 30 minutes, 2m impact resistance tested Uses two CR123A lithium batteries (Batteries included) Can be used with Streamlight 18650 battery