This is an economical and widely used transistor detector. You can use it to detect NPN and PNP transistor, capacitor, resistor, diode, triode, N-channel and P-channel MOSFET, triac and battery, etc. used to detect infrared waveforms. Features: It can be widely used to detect NPN and PNP transistors, capacitors , resistors, diodes, triodes, MOSFET, IGBT, JFET, Triac, etc. It can also detect Zener diode and has self-calibration function. After detection, align the infrared remote control with the ""IR"" indicator light, then press the button on the remote control. If the detector decodes it, it will display the data code and infrared waveform. One button is enough to automatically detect and shut down, and you can also press the multi-function button to close the detector. Place the component pins in the corresponding area, then dial the small handle and the detector will test it automatically. The results will finally be displayed on the backlit TFT screen. Unlike the usual black and white display, this detector will display the results in color. Features: Power mode: rechargeable lithium battery Display: 3.5 * 3cm TFT screen Diode range: Capacitance: 25pF-100mF Resistance: 0.01-50 M Inductance: 0.01mH-20H Battery: 0.1-4.5V Item Size: 8.8 * 8 * 2.8cm / 3.47 * 3.15 * 1.10in Item Weight: 111.5g / 3.94oz L Size Package: 14.5 * 12 * 2.7cm / 5.71 * 4.73 * 1.06in Package weight: 114g Package list:< /p> 1 * transistor tester 1 * set of electronic components (send randomly) 3 * Test hookSend randomly) Note: Before testing, please discharge the electronic components to protect the detector. When the voltage and internal battery are under 3V, charge them before use. p> Please use 5V battery or USB interface to charge.