1. Press and hold the play/pause key and the broadcast/select key for 3 seconds at the same time on the host.

2. After release, a green background icon will appear, indicating that it has entered the factory setting mode.

3. Press the broadcast/select key and the mute/universal mute key. After release, it will show that the factory settings have been successfully restored. Restoring the factory settings can make the Blue Baby Rubber Duck Early Education Machine re-enter the initial state and return to the initial settings, which can better save time and resources.