Digital LCD display for easy readings, can display measured data and graphics. switch control, a key measurement for convenient use. Main chip is the DIP, easy for electronic enthusiasts to DIY or the main chip. Use 9V battery(not included), can also use DC power(DC 6.8-12V). Automatic shutdown, shutdown current is only about 20nA. Automatically detects NPN and transistors, FET, diodes, dual diode, thyristor, , automatic identification of the transistor pinout. Test NPN and transistor common-emitter current amplification factor, the base-emitter voltage, off the - emitter leakage current. Support 2 resistors measurement, show and negative, on-state voltage. Resistance measurement maximum resolution 0.01, can be measured up to 50M. Automatically test the pins of a component and show on the display. Measure FET gate voltage and gate capacitance. For the following 2100 resistor while measuring inductance measuring range from 0.01mH - 20H. Can be used as signal generator and frequency meter: frequency range from 1Hz-2MHz and can generate 1%-99% PWM( width modulation) signals. Notice: measuring capacitance, the capacitor must be discharged, otherwise very likely damage the meter. Display: 160 x 128 LCD Power Supply: 1 x 9V Battery(not included); DC 6.8-12V Current: . 30mA Resistance Measurement: Max. 50M Resistance Resolution: 0.01 Capacitance Measurement: 25pF~100mF Capacitance Resolution: 1pF Measurement: Up to 50V Screen Size: 3.7 x 3cm / 1.45 x 1.18inch PCB Size: 7.8 x 6.2cm / 3.1 x 2.44inch Product Weight: 66g / 2.3oz Model Number: GM328A Transistor Tester Type: A color:As shown Material:PC+ metal Package Contents: 1 x sistor Tester(English Language) Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.