MARATAC AAA Specifications Length 2.7", Diameter 0.5" Body: 300 series stainless steel with non-glare bead blast finish LED: Cree XR-E Q5 Reflector: Aluminium alloy Lens: Anti-reflective coated glass Reverse polarity protection 3 levels of brightness: 1.5 lumens (50 hrs), 18 lumens (4 hours), 62 lumens (48 minutes) This is a superb little light, I'm very impressed with it. It always comes on at medium brightness which easily provides enough light for most tasks. Should your eyes be very adjusted to darkness then a quick one-handed twist on/off and it's in low mode. Another on/off twist and it's in high mode. Logical and dead simple. The aggressive knurling facilitates this so it isn't fiddly at all. The torch comes with a pocket clip and a lanyard loop, both are very secure. As this torch is so tiny both of these help with grip in the hand, you don't feel as if you could drop it. The stainless steel gives it a good solid feel. Tiny, very bright and very simple. The 3 light levels have been chosen sensibly, each having a definite use. This is a little toughie that I'll have no qualms pocketing with keys and coins. Highly recommended EDC. I know there is already a Maratac AAA review here but this little addition to the family deserves a mention.