LONGER has developed its own independent R&D center, and applied for patents up to 50 and got 28 authorized patents, including 21 utility models patents, 5 appearance patents and 2 invention patents. As present, LONGER has 3 main product categories including consumer 3D printers,industrial 3D printers, and 3D printing materials. With the strict production and quality management system, the whole product series has been authenticated by CE, FCC, and RoHS.