Turns onto the red setting! Will cycle to green and blue with clicks close the initial turn on, but once it’s been on a few seconds, any click thereafter will shut it off. You really have to want another color for it to not turn red. The only way to turn the white light on is VERY deliberate. It’s a 5ish second hold, only accessible on red and only close to initial turn on (at least that’s what I’ve seemed to gather) And it packs some lumens for how small. I’m super happy with my purchase. This will not get you killed.