It can be widely used to detect NPN and PNP transistors, capacitors, resistors, diodes, triodes, N-channel and P-channel MOSFET, IGBT, JFET, triac and batteries, etc. It can also be used to detect infrared waveforms. It can also detect Zener diodes and has a self-calibration function. After detection, point the infrared remote control at the "IR" light, and then press the button on the remote control. If the detector decodes it successfully, it will display the data code and the infrared wave signal. One-button operation, automatic detection and shutdown, and you can also press the multi-function button to close the detector. Place the component pins in the corresponding area, then turn the small handle, and the detector will automatically test it. Finally, the results are clearly displayed on the backlit TFT screen. Unlike the usual black and white display, the detector displays colored results. Note: The package of electronic components is random and cannot be selected. Material: ABS Color: White Package Contents: 1 x Multifunction Transistor Tester 1 x Set of Electronic Components 1 x Cable br/> Only the above package contents, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.