The Inova Microlight is an ingenious precision engineeredmicro LED flashlight with surprising performance. From itstough polycarbonate construction to its multi-function switchmechanism to its LED lamp the Microlight is subtle but veryeffective. The Microlight also features four lighting functions and awater-and-crush-resistant body plus a stainless-steeluniversal clip that attaches easily to keys zippers pursesbackpacks military gear and any number of convenientlocations.Dimensions: (length by diameter) 1.85" H x 1" W .325"DWeight: .35 oz.Lumens: N/ARuntime: Up to 15 HoursEffective Range: Up to 50 ftSignal Visibilty: Up to 1 mileBattery Type: 2-2016 lithium