It can be widely used to detect NPN and transistor, capacitor, resistor, diode, triode, N-channel and P-channel MOSFET, IGBT, JFET, triac and battery etcIt can also be used to detect infrared wave forms. It also can detect zener diode and has the function of self-calibrationAfter detection, align the infrared remote control with the "IR" light, then press the button in the remote control, if the detector successfully decode it, it will display the data code and infrared wave formOne button operation, automatically detect and shutdown, and you can press the multi-functional button to the detector tooPut the pins of component in corresponding area, then dial the little handle and the detector will test it automatically, finally the results will display on the back light TFT screen clearlyNot like the usual display, this detector will show results in colorNote: The electronic component package is random and cannot be Material:ABScolour:WhitePackage Contents:1 x Multi-function transistor tester1 x Electronic component set1 x cableOnly the above package content, other products are not included.Note: Light 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 +/- 1-3cm.