Transistor Tester: Automatic detection of NPN and PNP bipolar transistors, N-channel and P-channel MOSFETs, JFETs, diodes (including dual diodes), N- and P-channel IGBTs, resistors (including potentiometers), inductors, capacitors, thyristors, triacs, and batteries (0.1–4.5 V). Automatic detection of Zener diodes (0.01–20 V). Self-test with automatic calibration. Specifications: - Zener diode test area - IR receiver window - Micro-USB charging interface - Charge indicator LED - 160×128 TFT display - Multifunction key - Transistor test area - IR decoder: supports IR code recognition and IR waveform display - Infrared receiving instruction Features: - Measurement results displayed graphically on TFT screen (160×128) - One-key operation - Auto power-off (timeout configurable) - Built-in high-capacity rechargeable Li-ion battery - Li-ion battery voltage detection Warning: Built-in Li-ion battery — do not immerse in water or place near heat sources. For safety, follow all Li-ion battery usage guidelines and precautions. Note: Appearance, color, and printed text may vary slightly between batches; this does not affect functionality. Material: Plastic Color: White + Blue Package Includes: 1 × Transistor Tester Kit Note: Other accessories shown in images are not included. Color appearance may vary slightly due to lighting and screen differences. Measurement tolerance: ±1–3 cm.