Which chime should i buy?

Hi - I had a ring video doorbell for Christmas but no chime and I struggle to hear it indoor. The doorbell is non-battery and not hardwired - so I have to take it off to charge every month or so. Can I buy any chime or do I need to look for certain type? I don’t want anything fancy just a basic bell sound or similar noise to let me know someone’s at the door. Thanks