A combination of a diffused lens (on top) and a collimated focused lens (on bottom) creates a very bright 180-degree beam pattern than alternates between a wider beam and a narrow beam. Since the eye must juggle these two beams, it doesn't get a chance to relax, resulting in a very high level of visibility. The toggle switch makes it easy to turn on and off even with gloves on. Handle bar, seat post, seat stay and fork mounts are included, and the built-in clip allows for attachment to your helmet, pack or messenger bag. Rear light.
Lamp: 2 half watt maxbright LED
Burn time: 121 hours Batteries: 2 AAA batteries (alkaline)
Weight: 81g, 2.8 oz Attachments: handlebar, seat post, seat stay, fork, helmet and messenger bag
Control: toggle switch