What's in the box:

1 X Multifunctional LCD GM328A Transistor Tester Diode Capacitance ESR Voltage Frequency Meter PWM Square Wave Signal Generator SMT Soldering, Standard

Multi-functional transistor tester for automatic detection of NPN and PNP transistors, FET, diodes, dual diode, thyristor, SCR, automatic identification of the transistor pinout. It also can be used as square signal and PWM signal generator.

Features:
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(not included), can also use DC power(DC 6.8-12V).
Automatic shutdown, shutdown current is only about 20nA.
Automatically detects NPN and PNP transistors, FET, diodes, dual diode, thyristor, SCR, automatic identification of the transistor pinout.
Test NPN and PNP transistor common-emitter current amplification factor, the base-emitter threshold voltage, off the collector - emitter leakage current.
Support 2 resistors measurement, show its positive 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 threshold voltage and gate capacitance.
For the following 2100 resistor while measuring its 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(pulse width modulation) signals.

Notice:
Before measuring capacitance, the capacitor must be discharged, otherwise very likely damage the meter.

Specifications:
Display: 160*128 LCD
Power Supply: 1 * 9V Battery(not included); DC 6.8-12V
Current: Approx. 30mA
Resistance Measurement: Max. 50M
Resistance Resolution: 0.01
Capacitance Measurement: 25pF~100mF
Capacitance Resolution: 1pF
DC Voltage Measurement: Up to 50V
Screen Size: 3.7 * 3cm / 1.45 * 1.18in
PCB Size: 7.8 * 6.2cm / 3.1 * 2.44in
Product Weight: 66g / 2.3oz
Package Weight: 69g / 2.45oz

Package List:
1 * Transistor Tester

English User Manual:
https://www.dropbox.com/s/i58od389e3ip9hd/E1821 User's Manual.docx?dl=0