The Princeton Tec Swerve adds a new dimension to your bike commute. This hands-free flashlight by Princeton Tec uses two high-powered LEDs flashing at an alternating rate to create a long throw 180Â° beam pattern. Because the eye must juggle these two beams it doesn't get a chance to relax, and the result is a very high level of visibility. This technology makes the Princeton Tech Swerve Hands Free Safety Light one of, if not the most, effective tail lights on the market. Yes, we said so. The switch extends beyond the perimeter of the light and allows for easy operation while riding. It is on a pivot - the middle is the off position. Move the switch down to activate a flash pattern or up for a steady light. Princeton Tec talks to a lot of people about how they use their lights, and you'd be surprised at how personal a choice the mounting part can be. So much so that they've ensured this headlamp has as many mounting options as possible â€“ handle bar, seat post, seat stay and fork mounts are included. And the built-in clip of the Princeton Tec Swerve Bike Tail Light allows for attachment to your helmet, pack or messenger bag.