I believe the plastic grid looking thing on your ceiling is a speaker.
The unit labeled Iota is your battery charger: see more here:
The circular metal or plastic thing in your kitchen appears to be a towel holder. It is attached to the plastic "chimney" that directs waste heat from your refrigerator up and out a vent in your roof. Next to the chimney are power outlets, 110 volt standard outlets that likely only work when your trailer is plugged into what we call "shore power" meaning the RV outlet you find at campgrounds so equipped. Above the 110 is, I believe, a 12 volt
DC "cigarette lighter" type outlet that is powered from your Battery and/or charger/converter.
Under those is a metal catch for your window blind to hold it closed when you pull the blind down and hook it underneath on both sides. Next is a one of two levers used to open and close your window.
And, the last picture, I believe is a lever to open the exterior exhaust vent for your -over-the-range hood fan, and a switch to turn the fan on and off.
Hope this helps.