Truly tiny, the Nano Light® is a weatherproof, personal flashlight featuring a 100,000 hour life LED. Includes a non-rotating snap hook for easy one handed operation when attached to a keychain. Easily attaches/detaches to just about anything with convenient pocket clip or key ring Up to 8 hrs. run time Machined aircraft-grade aluminum with anodized finish Powered by 4 alkaline button cells (included) 100,000 hr. lifetime high-intensity LED LED available in white (10 lumens) 1.47" x .51" .36 oz.