self-ending
adjectiveUK /ˌselfˈendɪŋ/
US /ˌselfˈendɪŋ/
Something self-ending stops by itself without anyone helping it stop.
The toy has a self-ending song that stops when it is done.
OTHER MEANINGS
2. Able to bring itself to a close naturally.
The story is self-ending, so you do not need to say when it is over.
3. Ending without outside help or control.
The game is self-ending after ten minutes.
4. Having a built-in finish.
This self-ending book closes with a happy last page.