Streamlight 99110 Nano LED Key Chain Light (10 Lumen), Black, 12-Pack Truly tiny, measures 1.47 inches in length 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 Batteries included 5mm white LED, impervious to shock with a 100,000 hour lifetime