Question: guests can relax in the room's ...
Answer: --> Guests can relax in the room's ...

Question: 2. auto play mode - father/mother can set the sound play interval and play times.
Answer: --> 2. Auto play mode - Father/Mother can set the sound play interval and play times.

Question: especially since you know exactly where it comes from and how it was grown.
Answer:
--> Especially since you know exactly where it comes from and how it was grown.