The light itself is 2.18 x 1.09 x 0.43 inches not including the S-biner clip.
It’s made of water-and-shock-resistant plastic that has a soft slightly rubberized feel. There’s also a rubber non-slip thumb grip pad on the top.
The Microlight STS is powered by 2 2032 lithium batteries which are already installed and can be replaced if desired. The LED has a max output of 16 lumens which will drain the batteries in 9hrs if left on at that setting. If you run the flashlight on the lowest setting (2 lumens) continuously, you can get up to 64hrs of light on a set of batteries.
The Inova Microlight is an ingenious precision engineered micro LED flashlight with surprising performance. From its tough polycarbonate construction and multi-function switch mechanism to its LED lamp, the Microlight is subtle but very effective. Powered by 2-2016 Lithium coin cell batteries the Microlight offers advanced design and engineering in a key holder-size lighting instrument with up to a 50-foot effective range and up to a one-mile signal visibility. The Microlight also features four lighting functions, 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.