Review on NAPASA Electric Bike Horn: 100-120 DB Waterproof 4 Sound Modes with Rechargeable Battery - Electronic Bicycle Bell for Safety and Convenience by Drew Gengler

Pros:* One of the four modes sounds like a car horn* Lightweight and rechargeable Cons:* Too easy to accidentally press the button to lock the car* switch* horn when you want to hit the whistle so you get a silly sounding beep and have to cycle through them all to get back to the mode you want.* It's not loud enough. In urban areas (and on busy roads), people in cars don't hear the horn.* If you have a thicker than average steering wheel, the included mounting kit may not be enough. I had to use some extra zip ties (not included) to secure the horn and buttons. to do hurt.