KKmoon MRH1631426738275XW Multifunctional LCD GM328 Transistor Tester Diode Capacitance ESR Voltage Frequency Meter PWM Square Wave Signal Generator Digital LCD display for easy readings, can display measured data and graphics. Rotary switch control, a key measurement for convenient use Main chip is the dip, easy for electronic Enthusiasts to DIY or update the main chip. Use 9V battery included), can also use DC powerful 6.8-12V) Test npn and pnp transistor common-emitter current amplification factor, the base-emitter threshold voltage, off the collector - Emitter leakage current Automatically detects npn and pnp transistors, FET, diodes, dual diode, thyristor, automatic identification of the transistor pin out Support 2 resistors measurement, show its positive and negative, on-state voltage. Resistance measurement maximum resolution 0.01, can be measured up to 50m