Description: 【Essential Grounding & Socket Verification】: Instantly confirm that your grounding mats, blankets, and sheets have a proper earth connection for optimal performance. Socket tester, quickly identifying common wiring faults like open ground, open neutral, or wrong polarity to prevent electrical hazards 【Conductivity Test Pen】: The included conductivity pen allows you to easily touch any part of your grounding product's fabric or accessories to verify they are conductive and functioning correctly 【Effortless Plug and Play Operating】: Designed for everyone, not just electricians. Simply plug the tester into any standard outlet, and the bright, easy read LED indicators will give you an immediate and clear report 【Compact, Portable Design】: Built for convenience, its small size makes it great for use at home, in the office, or even while traveling. Crafted from flame retardant DBS, this tester is designed for both security and long time reliability 【2 in 1 Testing Kit】: The package includes 1 Socket Tester and 1 Conductivity Test Pen, providing solution for both general electrical security and verifying your wellness grounding products Size Chart: Conductivity Test Pen: 1.8cmx12.6cm/0.71inchx4.96inch Outlet Tester: 3.8cmx8.5cm/1.50inchx3.35inch Package Includes: 1 Outlet Tester 1 Conductivity Test Pen Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.