Several types of external screens exist: 1. Screens with cassette. The sealed cassette protects the fabric from bad weather and guarantees that your equipment lasts longer. 2. Traditional screens. There are two types of screen systems: a rail system that guides the fabric along rails, or a cable system that guides its travel freely. For these screens, we recommend you use the Suneo Io motorised system. 3. Zip screens. The fabric is held in place in the side channels thanks to a half-zip system. For these screens, we recommend you use the Maestria 50+ Io motorised system.