1. with the patented technology, slide air-pressure floor pull up screen can offer easy operation and great flexibility of height adjustment. \n special air-pressure lifting device with one touch raising and lowering.\n2. specially designed with aluminum alloy shell material. light weight and easy packed casing. it\'s easy to carry.\n3. can specify all kinds of high-gain screen surface material.\n4. highly mobile design, suitable for travel, home, meeting rooms, exhibition spaces, places such as the office or classroom.\n\nproduct specifications(for example):\n\n1. projection screen size: 80\"(4:3)\n2. screen size (projection area): 1220 x 1630mm\n3. carton size: 1760mm\n4. case size: 150x1450x1880mm\n5. nw / gw: 11.8/12.5 kg\n