ivolum 111&ldquo; Manual Projector Screen, 1:1 format, Manual pull down projector screen ivolum manual pull down projector screen 111 (78 x 78 viewing area), format 1:1 White housing (85 x 2.5 x 2.5), wall or ceiling mounting Gain 1.5  ideal for home cinema or business presentations. Suitable for high resolution content including 4K. Screen can be stopped at different heights (approx every 10cm) using the handle so it can be adjusted to fit different formats Built-in pull down mechanism works consistently and reliably