Electronic bicycle horn mounted and operated on a mountain bike
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power
Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power

Fellmont Outdoors · 14:29#Battery-taye

Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power

£9.99 £19.99Save 50%
  • Electronic tone cuts through traffic, wind and headphones in a way a bell cannot
  • 3 x 3 x 3.5cm, so it leaves room for your lights, computer and controls
  • Waterproof housing - winter grit and wet commutes are not a problem
  • Button sits under your thumb, so you sound it without moving your hands
  • Fits bikes, scooters and children's bikes, tool-free
  • Two versions: coin-cell battery or USB-C rechargeable - the battery one has no charging port
Power Type

In stock, ships by Wed, 4th Nov

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  • 30 Day Returns
  • Free Shipping
  • 1 Year Warranty
Delivery & returns

Tracked delivery on every order. Returns accepted within 30 days in original condition.

What's in the box
1 x electronic bike horn in your chosen version Handlebar mount Type-C cable on the rechargeable version
Specifications
Type Electronic bicycle horn
Size 3 x 3 x 3.5cm
Material Plastic and metal
Water resistance Waterproof housing. No IP figure is published
Power 2 x CR2032 cells, or the Type-C rechargeable version
Mounting Handlebar, tool-free
Model BG-3509
Volume No decibel figure is published
Suits Bikes, scooters and children's bikes
Product care
Check which version you have before looking for a charging port - the battery model does not have one. Keep spare CR2032 cells if you have the battery version, and keep them well away from children. Check the mount is tight after the first few rides. Rinse road salt off the housing in winter. A short press is a warning; leaning on it is a provocation. Use it like a car horn, sparingly.
Full details

When a traditional ring is not enough, this Fellmont Electronic Bike Horn makes sure you are heard. The electronic tone cuts through traffic noise, wind and headphones far better than a mechanical bell, which makes it a sensible safety upgrade for busy commutes, shared paths and school runs. It suits mountain bikes, road bikes, hybrids, children's bikes and scooters.

At just 3 x 3 x 3.5cm it takes up almost no handlebar space, leaving room for your lights, computer and controls, and the plastic and metal housing is waterproof, so wet rides and winter grit are no problem. It fits on the bars in moments and the button sits within easy reach of your thumb, so you can sound it without moving your hands from the grips. A short press gives a quick warning, which is far friendlier than leaning on it.

Two versions are available: the battery model, which runs on two CR2032 coin cells, and the rechargeable model with a Type-C charging port. Please choose carefully, as the battery version does not have a charging port. Keep coin batteries out of reach of children, as they are dangerous if swallowed. Order your Fellmont Outdoors electronic bike horn today and make sure you are heard.

  • Type: electronic bicycle horn
  • Size: 3 x 3 x 3.5cm
  • Material: plastic and metal
  • Water resistance: waterproof housing
  • Power: 2 x CR2032 batteries or Type-C rechargeable version
  • Mounting: handlebar, tool-free
  • Model: BG-3509
  • Suits bikes, scooters and children's bikes
  • 3.5cm Takes almost no bar space
  • Thumb Sound it without moving your hands
  • 2 versions Battery or USB-C

Being heard

A bell is not always enough.

On a quiet towpath a bell is the right tool. On a **busy commute, next to traffic, or behind someone in headphones**, a mechanical ring simply does not carry. The **electronic tone** here is designed to cut through engine noise and wind, which makes it a sensible safety upgrade rather than a gadget.

  • **Cuts through traffic noise, wind and headphones**
  • **Busy commutes, shared paths and school runs**
  • **Bikes, hybrids, kids bikes and scooters**

On the bars

Small, and where your thumb already is.

At **3 x 3 x 3.5cm** it takes up almost no space on a crowded cockpit, which matters once you have lights, a computer and gear shifters fighting for room. The **button sits under your thumb**, so you can sound it **without taking a hand off the grip** — which is the moment you least want to be fumbling.

  • **3 x 3 x 3.5cm** - room left for everything else
  • **Thumb button** within reach of the grip
  • **Tool-free handlebar fitting**

Choosing a version

Read this bit before you add to basket.

There are **two different horns** here. The **battery model** runs on **two CR2032 coin cells** and has **no charging port at all**. The **rechargeable model** charges over **Type-C**. Pick the wrong one and you will be looking for a socket that does not exist. **Coin cells are dangerous if swallowed** — keep them away from children.

  • **Battery version** - 2 x CR2032, no charging port
  • **Rechargeable version** - Type-C port
  • **Keep coin cells away from children**
  • 30 Day Returns

  • Free Shipping

  • 1 Year Warranty

Customer Reviews

Includes reviews collected from other sales channels.

4.61 out of 5 Based on 75 reviews
  • 5 60
  • 4 7
  • 3 5
  • 2 0
  • 1 3
  • Clare Stehr11 August 2026

    Shipping was fast and the horn really sounds good for the price people can actually hear when u beep and its very good access

  • Hillary Jerde1 August 2026

    Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power

  • Karyl Steuber15 June 2026

    Very good and very loud 😱 it also has 5 different sounds to choose from. there are 2 types of horn (1 is battery powered and the other is rechargeable with the 'c' type usb) so, be careful and make sure to pick the correct one for you.

  • Kristal Toy14 June 2026

    The sound is loud and nice... people step aside easily haha.

  • Jackie Doyle12 June 2026

    Super original item and fast delivery, plus well-packaged products.

  • Steve Marvin7 June 2026

    Great product, I recommend it! The sound is good and it can be used perfectly.

  • Albert Bailey5 June 2026

    Everything OK!! Unboxing on the Canal Dias do Pedal!!! Cuuuuuidad, MÉNÍNÔ!!

  • Louie Von4 June 2026

    Very good bicycle horn. easy to install. loud signal. the different signal tones can be switched by pressing and holding the button.

Frequently Asked Questions

Which version should I buy?
If you would rather never think about charging, take the battery version and keep a pair of CR2032 cells in the drawer. If you would rather never buy batteries, take the Type-C rechargeable one. The important thing is that the battery version has no charging port at all - that is the single most common mistake on a listing like this.
How loud is it?
No decibel figure is published, so we are not going to print one. What we can say is what it is for: an electronic tone carries through engine noise and wind in a way a mechanical bell does not, which is the reason to choose one over a bell.
Is it waterproof enough for winter riding?
The housing is sealed for weather, so rain and road spray are fine. There is no published IP figure. Rinse the salt off in winter, the same as you would with any handlebar electronics.
Will it fit a child's bike or a scooter?
Yes - it is small and mounts tool-free to a standard handlebar, which covers most children's bikes and scooters. On a very small bar, check there is 3.5cm of clear space before ordering.
Do I still need a bell?
On shared paths a bell is often the more courteous choice, and some local rules or cycle schemes specifically ask for one. Plenty of people run both - a bell for walkers, a horn for traffic. Check what applies where you ride.
Are the coin cells safe around children?
Coin cells are seriously dangerous if swallowed and can cause fatal internal injuries very quickly. Keep spares in their packaging, out of reach, and if this is going on a child's bike, make sure the battery compartment is properly closed. The rechargeable version avoids the issue entirely.
  • 5 stars: 60 (80%)
  • 4 stars: 7 (9%)
  • 3 stars: 5 (7%)
  • 2 stars: 0 (0%)
  • 1 star: 3 (4%)
C
Clare Stehr

Shipping was fast and the horn really sounds good for the price people can actually hear when u beep and its very good access

H
Hillary Jerde

Electronic Bike Horn – Loud Waterproof Electric Bicycle Bell for Mountain Bikes, Scooters & Kids Bikes, Compact Handlebar Alarm with USB or Battery Power

K
Karyl Steuber

Very good and very loud 😱 it also has 5 different sounds to choose from. there are 2 types of horn (1 is battery powered and the other is rechargeable with the 'c' type usb) so, be careful and make sure to pick the correct one for you.

K
Kristal Toy

The sound is loud and nice... people step aside easily haha.

J
Jackie Doyle

Super original item and fast delivery, plus well-packaged products.

S
Steve Marvin

Great product, I recommend it! The sound is good and it can be used perfectly.

A
Albert Bailey

Everything OK!! Unboxing on the Canal Dias do Pedal!!! Cuuuuuidad, MÉNÍNÔ!!

L
Louie Von

Very good bicycle horn. easy to install. loud signal. the different signal tones can be switched by pressing and holding the button.

N
Nicolas Lemke

Excellent bike horn. loud, easy to install, and works perfectly. fast shipping. recommended! 🚲📢

L
Latarsha Schaefer

It's a great product.

K
Kasha Stokes

The product is of good quality, I recommend it to everyone.

G
Geraldine Carroll

Flawless functionality and delivery. Easy installation.

A
Arleen Kuhic

Wow i really love this this is what i order they brought to me i love it it's good

A
Audrie Doyle

It looked great on the bike.

S
Shona O'Connell

Good sound, small and convenient, just need to tape some electrical tape on the top of the button to prevent it from falling out!!!

B
Brooks Haley

Sounds good, small and practical, comes with a Type-C charging cable, the charging area is well protected to prevent contact with water.

L
Lucy Wolff

I ordered the battery-operated version, they sent it with 2 batteries. Hold the button down for 5 seconds to change the melody; I kept the third one, which sounds like a police car siren... The volume is a bit low; if it's quiet outside, you can hear it well, but if cars are driving nearby, it's hard to hear...

M
Mario Jenkins

The bell for the bike or scooter is great. I recommend it.

R
Raphael Nicolas

This is the second time I've bought it. The first time it was stolen from me. Very good. Good luck.

A
Angeles Yost

せっかくだから充電式のやつを買いました。かなり音大きいです。この値段でこれは中々。壊れたらまた買おうと思います