The document provides an overview of the SECUTEST SIII+ electrical safety tester. It describes the tester's features such as its ability to perform protective conductor connections, insulation resistance and leakage current tests. It can automatically adapt to different mains power standards and recognize safety classes. The document outlines the tester's various measurement capabilities and options to connect additional units or interfaces for printing and data management. Predefined automatic test sequences are available for common safety standards like IEC 60335 and DIN VDE 0701.