Quick and highly sensitive live wire identification - Touch the touch electrode with your hand and insert the pen tip into the hole to quickly identify live wires. Red display with a buzzing sound indicates live, while green screen with no alarm indicates neutral. Two-color digital tube real-time prompts - Real-time voltage readouts are shown on a two-color digital tube for easy interpretation and readability. Removable pen cap - The removable cap provides a protective measure to reduce arcing and leakage during use. Maintenance assistant - This intelligent voltage test pen serves as a maintenance assistant, allowing easy and accurate detection of voltage levels. Applications - Home wiring work such as installing or replacing outlets and switches. - Circuit troubleshooting in electrical panels or junction boxes. - On-site appliance repair and maintenance to verify proper wiring before service.