SureFire E2D Defender High-Output Self-Defense Light 60 Lumen Batteries - Two lithium 123A 3.0 Volt with 10-year shelf life Lamp assembly/Runtime - SureFire MN03 xenon gas-filled lamp assembly with 60 lumens output for 75 mi Construction - CNC machined aerospace-grade aluminum. Hard anodized finish for extreme corrosion imp Lightweight and slim, with a stainless steel pocket clip Perfect for placement in your backpack, glove compartment, toolbox, or pocket.