If the ringing of your bicycle's bell isn't getting the response you're after from motorists—namely, please don't hit me—it might be time for an upgrade. Instead, try the Orp, an LED headlight that easily lashes and unlashes from your handlebars and emits a loud shriek that can be heard inside a running car—even with the windows rolled up.
The Orp actually has two different horns to choose from. A polite and subdued 76-decibel chime to alert pedestrians of your approach, and a more obnoxious—though effective—96-decibel shriek to let drivers know you're nearby.
It's completely waterproof, and of course rechargeable—the 87-lumen LED headlights run for a solid three hours on a charge (and even longer if set to flash). It's a little on the expensive side—no doubt there—but can you really put a value on not getting creamed by a distracted driver who didn't know you were there? [Torcano Industries via TheGearCaster]