This is one of SureFire's only lights that doesn't run on CR123 Lithium batteries. As you can guess from the title, it uses a pair of AA batteries. Two stages, high and low, the high is about 80 Lumens and the low is 3 Lumens. The runtime on normal alkaline batteries is great, and even better with the lithium style AAs. Something like 50 or 60 hours on low. Don't quite remember, but the specs are all over the web. This light is in great shape, it was barely used.
Batteries not included. As-is. Does not include box, packaging or any accessories not shown.