How to add field in accomodation section (Products Plugin)?

I have this section when I'm adding product in my website.

I want to add a new field. eg. I want to add "Bathroom" field name and a textbox for input.

I'm checking if there's a settings to add a field on the section. These are the settings for other info's but I think there's no settings to add a field for the accomodation section when adding a product.

What can I do?

via Chebli Mohamed