Review on AUXMART 100W 12V Car Siren Horn: Enhance Your Vehicle's Safety with 7 Tone Sound, PA Speaker, and Mic by Victor Anderson

It is noisy and very easy to install. It really looks like a toy, but it's noisy. It's been two days and it's still working. We'll see when it stops working, but overall it's a good $30 product. Update: It's not waterproof. Went to a car wash and didn't realize it was making static noise until I got home. I unplugged it for a week and it worked fine, but then it started raining very hard and the rain killed it.