SureFire G2L-Single-Output LED Flashlight, OD Green Virtually indestructible LED emitter regulated to maximize output and runtime Precision micro-textured reflector creates smooth, optimized beam Two 123A Lithium Batteries Maximum Output 80 Lumens Tough, lightweight Nitrolon body with deep grid pattern for secure grip Tactical tailcap switchpress for momentary-on, twist for constant-on