I wonder if that's the one the author refers to when they say, "I purchased one of the few similar products on the market. To my surprise, it relied solely on a basic tilt switch, rattling excessively during rides despite claims of “advanced technology."
I have one of the Brake Free lights and it uses an accelerometer, it's NOT just a basic tilt switch. Nor does it rattle when riding, it's a very solid unit.
I've had friends following me (both in cars and motorcycles) who comment later they can't believe how much more visible it makes me.
It does attach to a helmet and require that you periodically recharge the battery but I'm very happy with the purchase (as opposed to just flashing the brake lights on the bike when slowing)
