This bad boy is insanely bright, lighting a completely dark room with ease. You want to hold it above your head if you value your night vision because there's no shroud around the led, so your peripheral vision will pick it up easily.

It's almost too small for comfortable use, but I have large hands. The on/off switch requires a thumbnail to operate cause it's so tiny.

The unit is solidly built, held together with 4 tiny screws. Instructions are included on how to replace the batteries. It uses 2 CR2016 watch batteries.

The case is glass-filled polyurethane and the LED is a solid state full spectrum (6500 Kelvin), quoted from the instruction card.

The keychain part is also well made. There's a strong split ring on the unit, with a strong spring clasp on that.

If you keep a light on your keychain or EDC, you know how bulky many of them are. This light goes unnoticed, and it's the only one I know of with an on/off switch PLUS a momentary switch.

It's also made in the USA from American and foreign parts.

Overall a solid product and I'll never buy a different light again unless they make one slightly larger.

*Update 2-1-2012: Don't waste your time. After keeping this on my EDC carabiner and carrying it for over a year, it no longer functions properly. It seems the leads on the LED get bent out of shape over time from being in my pocket and pressing against stuff, so it stays on constantly. I tried bending the leads back but apparently if it's not exactly right, the light doesn't function right anymore. I also have several Chinese knockoffs that suffer from the same problem. If you want a small light to add to a zipper pull, this is a good product, just don't keep it in your pocket. I now use a Streamlight Microstream on my EDC carabiner. Bigger but much better and far brighter.
This bad boy is insanely bright, lighting a completely dark room with ease. You want to hold it above your head if you value your night vision because there's no shroud around the led, so your peripheral vision will pick it up easily. It's almost too small for comfortable use, but I have large hands. The on/off switch requires a thumbnail to operate cause it's so tiny. The unit is solidly built, held together with 4 tiny screws. Instructions are included on how to replace the batteries. It uses 2 CR2016 watch batteries. The case is glass-filled polyurethane and the LED is a solid state full spectrum (6500 Kelvin), quoted from the instruction card. The keychain part is also well made. There's a strong split ring on the unit, with a strong spring clasp on that. If you keep a light on your keychain or EDC, you know how bulky many of them are. This light goes unnoticed, and it's the only one I know of with an on/off switch PLUS a momentary switch. It's also made in the USA from American and foreign parts. Overall a solid product and I'll never buy a different light again unless they make one slightly larger. *Update 2-1-2012: Don't waste your time. After keeping this on my EDC carabiner and carrying it for over a year, it no longer functions properly. It seems the leads on the LED get bent out of shape over time from being in my pocket and pressing against stuff, so it stays on constantly. I tried bending the leads back but apparently if it's not exactly right, the light doesn't function right anymore. I also have several Chinese knockoffs that suffer from the same problem. If you want a small light to add to a zipper pull, this is a good product, just don't keep it in your pocket. I now use a Streamlight Microstream on my EDC carabiner. Bigger but much better and far brighter.