Digital LCD screen for easy readings, can display measured data and graphics. Switch control, one key measurement for convenient use. The main chip is DIP, easy for electronics enthusiasts to DIY or update 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, double diode, thyristor, automatic identification of transistor pinout. Test NPN and transistor common emitter current amplification factor, base-emitter voltage, cutoff collector - emitter leakage current. Support 2 resistance measurement, display positive and negative, on-state voltage. Resistance measurement maximum resolution 0.01, can be measured up to 50M. Automatically tests the pins of a and displays on the screen. Measure FET gate voltage and gate capacitance. For the following 2100 resistors while measuring inductance measurement range from 0.01mH - 20H. Can be used as a signal generator and frequency meter: frequency range from 1Hz-2MHz and can generate 1%-99% PWM (pulse width modulation) signals. Note: when measuring capacitance, the capacitor must be discharged, otherwise the meter may be damaged. 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: B Color: As shown Material: PC+ metal Package Contents: 1 x Tester (with shell) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real one. The allowed measurement error is +/- 1-3cm.