I might be wrong here, but you have the right to ask that he put the gadgets away while he is in session with you. He sounds like a gismoholic...
If my therapist was distracted by something like that I would say something. It would be like someone popping their head in the door constantly, which would distract the whole session. Right? This is no different.
He's distracted. You're distracted by his distractions. Ask for undivided attention! For crying out loud you are not getting it and you deserve that.