Quality Material and light control: Made of quality PVC with a gain of 2.5 to boost brightness and sharpen image clarity. A black lining on the back helps suppress unwanted light, delivering a distraction viewing experience. 178 Degree wide viewing angle: Offers up to 178 degrees of viewing from a quality matte white surface, allowing you and your family to sit comfortably without crowding in front of the screen. 4K/3D image quality and format options: Delivers accurate color reproduction for immersive images and is compatible with all frontfocus projectors, including 4K, HD, and 3D models. Supports 16:9 and 4:3 image formats; 16:9 provides a home theater feel, while 4:3 is suitable for teaching, meetings, web pages, and presentations. Portable and retractable design: Lightweight and easy to roll up for compact storage. Suitable for indoor, outdoor, and travel use, with a retractable design for convenient use on the go. Use scenarios: Home theater and family movie nights: Enjoy immersive 16:9 viewing from multiple seating positions without crowding. Classroom, training, or business presentations: Use the 4:3 format for teaching, meetings, and sharing web pages or documents. Outdoor events and travel: Take the portable screen to outdoor movie nights or business trips for quick, reliable projection.