Costar Group Co., Ltd. develops, manufactures, sells, and services optical components in China. It provides lens, prism, optical lens, optical accessories, photoresistor, etc., which are mainly used in digital projectors, digital cameras, smartphones, security monitoring products, etc.; and night vision sights, observation sights mirrors, aiming and target calibration systems, reconnaissance monitoring and display equipment, range of laser range finders, photoelectric countermeasure equipment, etc., which are mainly used in light weapons, individual soldier systems, and other fields. The company also offers projection display products, including ultrashort-throw projectors, engineering projectors, miniature projectors, and other product types, as well as multimedia classroom system solutions that are mainly for users, such as schools, commercial enterprises, and families.