Test Pen Introduction: This test pen is your capable assistant in daily life, characterized by high precision and fast response. It can not only detect voltage and power status, but also has short-circuit protection function to ensure safe use. The lightweight and portable design is suitable for home, office and outdoor use. Whether for electricians, maintenance personnel or home DIY enthusiasts, the test pen can help you quickly diagnose problems. Choose this test pen to make your electrical testing simple and efficient!