Kicking out a fairly nice blobette of light, this is more capable than you might think when it comes to getting your speed on.
The most impressive thing about it, though, is the small sizing and the long run time on full power. The three power levels are pretty good, and there are even three different flashing modes. This light scores well when it comes to mounting too, as it's simply held in place with an O-ring that you loop around whatever it is you want to mount it on. It also comes complete with a helmet mount, which is a simple little plate with a bulge section on it for the light to nest against.
It's simple, but it works a treat. You can expand the system too, with a Y-shaped wire allowing you to run another head unit from the four-cell battery or the Dinotte rear light.