This Aurora runs on one AAA battery. I thought this was a clicky from the photos showing the protrusion at the tailcap, but that's just a lanyard attachment point; the light is a twisty. The light came with a small split ring attached, with a black and stainless carabiner attached to the split ring. In terms of brightness, it's not 150 lumens with an alkaline AAA; probably around 90.
I didn't give it five stars because I thought it was a clicky. Overall, an excellent buy.