The manual projector screen comes with a 1:1 aspect ratio, which offers the all purpose format that is ideal for OHP use.This manual projector screen is perfect for watching your favourite programmes or movies from your home cinema projector. This projection screen comes with a spring recoil mechanism that makes it quite easy to use. Simply pull it down when you want to use it. When you are finished, give the bottom a quick tug, and the pull down screen will recoil to the top. Chase AV Direct UK sells these screens in ten sizes that will suit most home theatre setup. Sizes range from 125 x 125cm to 300 x 300cm. The plain design will match well with any home decor.