Review on 🚲 Ytuomzi Electric Bike Horn: USB Rechargeable, 120 db Loud & Invisible Cycling Alarm for Mountain/Road Bike Scooters - Waterproof & 3 Alert Modes - Fits Handlebar 22-31.8mm by Matthew Nunez

Although this bike horn works reasonably well, I managed to startle some pedestrians when I tried to signal that I was passing them. Instead of a horn, there was a shrill siren sound for several seconds, and it took me a while to figure out how to stop. And they may have just stopped on their own. It was a bit shocking for her and for me. Now I know not to touch the top button, just the bottom one. I thought one of the buttons would let me select either the alarm tone or the volume, but that doesn't seem to be the case either. Instead, it seems like he's quickly going through all four. Ouch!