Detects Electrical Conductivity - The conductivity test pen features copper probes and a built-in indicator light to quickly determine the presence of conductive materials in grounding sheets, mats, or pillow cases. Check Outlet Grounding Accuracy - The outlet tester diagnoses wiring conditions such as open ground, open neutral, open , and reverse polarity, ensuring your outlet is correctly wired and properly grounded. Reliable Grounding Performance - Accurately verify the functionality of your earthing systems and grounding products. A must-have ground tester for and plug tester for electrical outlets. Designed to work with grounding sheets, grounding mats, blankets, wristbands, and pillow covers, this kit ensures your products are actually conducting and providing effective grounding. Compact and easy to carry, this grounding meter tester for earthing set is essential for home users and frequent travelers. Helps verify electrical outlet integrity and grounding connection in any space. Color: As Shown Material: Metal+Plastic Package Contents: 1set * grounding meter tester for earthing Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.