Car Wink - The Voice for your car

CarWink is a solar powered device you attach to the rear windshield of your car to send quick messages to other drivers or people behind you. Once connected to the phone app, you can use your voice to send messages in the form of selected emojis.

Great idea as I have not seen anything like it and I wish I thought of this earlier. Its a nice substitute to show rage other than the flick of the middle finger. Although its a great start, there is a lot more work to be done and there's still room for competition to design a better product with better message transmission.