The "manual economy" series from Celexon is the most cost effective solution and offers excellent value for money. It provides a high quality mechanism so the screen is lockable at different stages. It can be mounted on the wall or ceiling and comes with eye and hook fixings to simply hang up.It provides a high quality mechanism so the screen is lockable at different stages. It is suitable for different aspect ratios from 1:1, 4:3, 16:9 to 21:9.