Powered by 2-2016 Lithium coin cell batteries, the INOVA Microlight is an ingenious micro LED flashlight, with a surprisingly powerful performance - it has an effective range of up to a 50-feet, and one-mile signal visibility. The Microlight also features four lighting functions and a water-and-crush-resistant body, plus a stainless-steel universal clip that attaches easily to keys, zippers, purses, backpacks, military gear and any number of convenient locations.
•Four Functions - High Power, Low Power, Strobe and Signal Mode
•Run Time (up to): 22 hours
•Effective Range (up to): 50 ft (15.24 m)
•Signal Visibility (up to): 1 mi (1.61 km) 
•Battery Type: 2-2016 Lithium batteries included
•Easy-Open/Snap-shut construction for effortless battery replacement
•Four LED Colors Available: White, Blue, Green and Red