UNI-T UT07A-EU socket tester is a simple device designed to detect common improper wiring conditions in standard 230V (+10%) Volt sockets. It can indicate issues like missing phase or neutral wires, incorrect grounding, and reversed polarity. The tester features a clear indicator cart to help users easily identify the wiring problems. It's important to note that the UT07A-EU is not a comprehensive diagnostic instrument and may not detect all possible wiring issues. For more complex problems, it's recommended to consult a qualified electrician.