Poly Studio - 4K USB Video Conference System | Raise The Bar – One Solution For All Your Meeting Needs – Poly 7200-85830-001 or HP 842D4AA#ABA. Put frustrating videoconferencing experiences behind you. Looking to make a persuasive point or a lasting connection? See and hear everyone clearly — and converse naturally — with Poly Studio USB video bar part # Poly 7200-85830-001 or HP 842D4AA#ABA. Simple USB connectivity gets up and running fast, keeping the technology in the background and you in the foreground. It's a business-class solution for everybody in the huddle room.