The document provides an overview of ultraviolet (UV) light and its various types: UV-A, UV-B, and UV-C, with a focus on UV-C's effectiveness as a disinfectant by destroying the DNA and RNA of microorganisms. Several models of UV-C sanitizers are detailed, including their specifications, usage areas, and safety precautions for operation. Additionally, it emphasizes the applications of UV and ozone sterilization in various settings such as hospitals, schools, and domestic environments.