Black Diamond Ion Keychain LightFeaturing 40 lumens of reliable light, the Black Diamond Ion Keychain Light is at the ready and clipped to your car keys with a BD carabiner so you can illuminate clutch situations. With a twist mechanical lock to preserve battery life, a dim mode, and a strobe for high-vis at night, the Ion runs on two coin-cell batteries (CR2032) to provide reliable light whenever you need it.Emits 40 lumens on max settingCarabiner keychainTwist mechanical lockDim and strobe mode>Runs on two coin-cell batteries (CR2032 included)