High quality square format professional wall screen Matt white surface eliminates glare Flat projection surface due to a large roller and powerful spring mechanism Wall brackets for keystone correction available Retract speed: 8-12 seconds Dimensions: 2440x2440x17mm (wxhxd) Viewing area: 2340x2340mm (wxh) Casing dimensions: 2510x78x78mm (wxhxd) 13.5kg