8 display patterns 8 easy-to-read indicators show the socket state for quick judgment. They cover common conditions such as wiring correct, missing neutral, missing earth, earth wire missing, reversed polarity, wrong live/neutral order, no live present, and live symbol display. EBTN LCD Display Reenwee large EBTN LCD greatly enhances readability in bright sun or poor light. Results are displayed graphically on the screen for easy understanding, helping any user operate confidently and complete checks efficiently. 3 RESULTS DISPLAY The large screen can display three test results: voltage values (live-to-neutral and zero-to-ground), plus analog bars and a wiring status indicator, all at a glance. SAFETY INSULATION DESIGN This RCD tester with LCD display uses an insulated design to minimize electric shock risk during use. It quickly detects whether socket wiring is correct, helping protect your safety during testing. Usage scenarios - Home testing: quickly verify wall outlets before plugging in appliances or power adapters. - Office or workshop: check outlets and power strips to prevent wiring issues from affecting equipment. - On-site maintenance or temporary installations: confirm wiring correctness before use of rented tools or new wiring setups.