Mmmmmmmmm.
Maybe my opinion, but I HATE with a passion anything developed in cars over the last 30-40 years that attempts to compensate for ignorant/stupid people in cars... bells, buzzers, flashing idiot light......
And as EJ said, you are adding something to this. Sell as many as you can to the fools I say! LOL
Good on you, NO DOUBT you are filling a niche market where there is demand.
No doubt filled by morons who probably also drive down the highway blissfully ignorant to the fact that they have their headlights on high beam, or for the last 20kms have had their indicator flashing.......
I guarantee the same dipshits will buy this stuff, yet still weave their way down the road with 3 different chimes sounding, wondering what the funny noises are.