1. The use of single chip microcomputer ATMEAG328P DIP-28 with IC block.2. The display unit uses a 160x128 color display, full-screen characters 8x20, 16-bit color depth, graphic display elements symbols.3. Rotating coding switch control, one-button measurement, automatic shutdown.4. Powered by 9V laminated battery (not included), can also use the power adapter, the whole current of about 30mA, about 20nA current after shutdown.5. Automatic detection of NPN and PNP transistors, FET, diodes, dual diode, thyristor, silicon controlled rectifier, automatic identification of the above transistor pin out.6. Test NPN and PNP triode common emitter current amplification factor, base-emitter threshold voltage, collector-emitter leakage current at turn-off.7. Identification for Darlington transistors through triode base-emitter threshold voltage and high current amplification factor.8. Detect power triode and FET built-in diodes.9. Test FET gate-source turn-on threshold voltage, drain-source on-resistance, gate-source capacitance.10. It can measure up to 2 resistors at a time, so the adjustable resistors of the three feet can also be measured. If the adjustable resistor is adjusted to the end point, only one resistance value can be measured.11. The resistance is measured at a maximum resolution of 0.01Ω. Can measure up to 50MΩ.12. Capacitor measurement range from 25pF to 100mF with 1pF resolution.13. For capacitors larger than 90nF, the equivalent series resistance (ESR) is measured at the same time. The resolution of the equivalent series resistance is up to 0.01Ω.14. For capacitors larger than 5000pF, the voltage drop rate after charging is also displayed. This value can reflect the quality factor (Q value) of the capacitor.15. Measure up to two diodes at a time, showing their positive and negative, on-voltage.16. The LED is also shown as a graphical symbol of the diode, which has a much higher turn-on voltage