ISE 2019: Optoma and Scan Pro Gaming Demo Setup With 4K 550ST Projector February 8, 2019 | Home / February 8, 2019 rave-video / ISE 2019: Optoma and Scan Pro Gaming Demo Setup With 4K 550ST Projector Look in: ISE ISE 2019: Optoma and Scan Pro Gaming Demo Setup With 4K 550ST Projector