- Measure voltage accurately with a built-in lithium battery that offers long-lasting power. - Charge using an external 5V power supply or a mobile phone USB adapter. A red indicator light shows charging status, while a green light indicates fully charged. - Versatile measurement capabilities: tests for transistors, diodes, resistors, capacitors, inductors, thyristors, field effect transistors, voltage regulators, double diodes, light-emitting diodes, and more. - Important: Maximum charging input voltage is 6V; using a higher voltage may damage the tester or battery. - Features automatic detection for Zener diodes within the 0.01-30V range, with self-testing and auto-calibration. The data code and infrared waveform display upon successful decoding. For remote control testing, align the infrared source with the "IR" light and press the remote button for easy one-key operation. - Energy-efficient with an adjustable auto power-off feature to save battery life. - Ideal for electronics enthusiasts, hobbyists, and professionals who require a reliable tool for testing and troubleshooting a variety of electronic components. - Suitable for use in workshops, labs, and at home for quick diagnostics of electrical systems and components. - Compact design for easy portability and convenient storage.