This app is a bicycle bell.
As an option, the current speed and time are voice-guided.

* Brightness

You can save a lot of battery by adjusting the brightness.

* Bell
- Default bell
7 built-in ringtones.
bike bell 1, bike bell 2, tubular, trumpet, car horn, cat meowing, dog barking

- Voice bell
Text-to-Speech

- User bell
User sound
MP3, OGG, WAV

* Speedometer
The speed is guided by voice for each distance entered.

* Time View
Time display on/off