Features ATmega328 microcontroller: Capacitance inductance resistor meter uses ATmega328 microcontroller to run, running smoothly, no jamming, it is a good helper for you to detect transistors, diodes, etc. LCD display: Capacitor ESR inductance resistor meter can display the results on a 128x64 graphic LCD display, the readings are intuitive and clear, and work is convenient One-key operation: MK328 ESR transistor tester meter can realize automatic power-off through one-key operation, simple operation, saving power, and improving work efficiency Turn-off current: The turn-off current of MK328 ESR transistor tester is only about 20nA, which affects the accuracy of the related resistance. Use a thousand-cent film resistor, and the remaining one percent is also a thin-film resistor. Application: MK328 ESR transistor tester can automatically detect NPN and PNP bipolar transistors, N and P channel MOSFETs, JFETs, diodes, double diodes, thyristors and triacs. Features: Operates with ATmega328 micro controllers. Displaying the results to a 128x64 graphic LCD-Display. One key operation with automatic power shutdown. Shutdown current is only about 20nA. Automatic detection of NPN and PNP bipolar transistors, N- and P-Channel MOSFETs, JFETs, diodes, double diodes, Thyristors and Triacs. Package includes: 1 x  Transistor Tester Package List