The AV Stumpfl Inline-Motor Strato is a complete motorized projection screen system with a 4:3 aspect ratio and an overall screen size of 310 × 235 cm. It includes the frame, stand, projection surface and white powder-coated aluminium casing. The STRATO surface is a coated non-woven glass-fiber material with a matt-white finish and gain 1.0. The 230 V tube motor provides fast, quiet operation with an electromagnetically released disk brake and overtemperature protection.