Race bicycle bell
Bicycle bubbles with a clear sound and easy to install. The trivio and the wrong call are simple bubbles with a reasonable sound.
The bubbles from Gueee have a handy turning system so that you can turn it to your trade or your gear wire.
Do you have a Wahoo and do you want to integrate everything? Then you can go for the Hidemybell variant where the bell is clogged under the holder of the Wahoo navigation system.