Recently we've added the Voice Prompt feature on V6.21.0 to give a more intuitive reminder when any of the ZUS devices is connected or disconnected. However, we are so careless to make it default ON for all the users which may have caused inconvenience to some of the users.
We are truly sorry for all the inconvenience this default setting has brought to you. We've already made it default OFF on V6.21.1 and have released it 100% to all the users.
If you find it annoying, you can manually disable the voice prompt in the Settings.
Click the upper left corner icon then select General, then you can switch off the Voice Prompts there.