Antfire Electric Bike Horn, 120DB Loud Bike Horn for Adults, USB Rechargeable Bicycle Bell, 2 Sound Modes IP65 Waterproof Bicycle Horn with Alarm for Road Bicycle, Mountain Bike, Scooter

This thing is so simple it's cool. So easy to program very loud alarm. Horn is much louder than original. On scooter. Alarm is very sensitive .I think the AC set it off and boy it scared me awoke me from a nap. I thought the smoke director went off but much loud I say! Charge lasts for 2 months, that's really cool. Great product.

Easy to use and install. The sound is a bit jarring but effective. USB recharging is far better than battery replacement. But on my various vintage bikes, this thing is just too ugly! I'll likely give to a friend and look for something else.

Exactly what you said it would be. I love the sounds.

First off, this thing was super loose on my handlebars. Impossible to press without holding it from spinning. I’ll find some plastic or rubber to fill, or else use 2 rings to hold it on. Not as loud as I wanted, but good for pedestrians. I had one lady literally jump out of the way as I approached from behind.

As described; Nice fitting design; Loud enough to be heard; features an electric horn and alarm system.

The media could not be loaded. Button functions doesn't work. All it does is blinking non stop.

Good quality and good price

When the description said that this was 120 decibels, I thought it might be too loud. I only wanted something to let pedestrians know I’m passing on the trails near where I live. Fortunately when it arrived and I charged it up and tried the horn. It was nowhere near as loud as I was expecting. It’s more of a buzzer and probably closer to 90 decibels. Which is pretty much what I wanted.At first I was surprised about how it mounts to the handlebars. It is fastened with a large rubber O ring that attaches onto both ends of the horn. It works well enough and makes it easy to remove when you want to recharge. You also get a spare rubber ring, but these are only a couple of cents at the hardware store if you lose them both.One neat feature is the alarm. You activate it with a single press of red button on top. If anyone bumps your bike the alarm goes off. When it does, it sounds a bit like a European police car siren. And since we have fairly expensive electric bikes having the alarm there gives me an additional peace of mind when we do groceries. It won’t make it impossible to steal them obviously but it is that extra deterrent.Overall, I’m very happy with it. It’s simple to use and is easy to remove and recharge via the USB port underneath. One thing to be aware of is that there are sticky rubber pads you must attach to the underside of the alarm. There are two rectangular shapes they fit into. The problem is they are combined on a single half inch sheet and easily missed. Without them, the horn has a tendency to slip around on the handlebars. Put them on and it stays put.This horn is pretty good and inexpensive. It’s not loud enough to honk at people in their cars but is great for alerting pedestrians and cyclists of your presence. Just what I needed.