Description: Digital 12864 LCD display, easy to read Automatically detect NPN and PNP transistors, N-channel and P-channel MOSFET, JFETs, diodes, inductors, resistors, capacitors, thyristors or other devices Support 2 resistors measurement, also support potentiometer measurement Automatically test the pins of a component and show on the display Measure the gate threshold voltage and gate capacitance of the MOSFET Specification: Measure bipolar transistor current amplification factor and base-emitter threshold voltage Short detection time: only 2 seconds. It costs more time for bulk capacitor detection Can be used as signal generator and frequency meter. Different built-in square signals from 1Hz-2Mhz are available to choose. It can generate 1-99% PWM(pulse width modulation) signals Can be powered by 9V battery(not included) Display: 12864 Voltage: DC5.5-12V Current: 24mA Capacitance Measurement: 25pF~100mF Capacitance Resolution: 1pF Inductance Measurement: 0.01MH~20H Material: PCB board Product Size: detailed Screen Size: 5 x 3.5 x 1.4 cm / 2 in PCB Size: 7.5 x 6 cm / 3 x 2.4 in Ways for using:Resistor welding. If you are not familiar with the chromatic circles, please check the resistance with a multimeter   Other components welding. Please make sure the transistor type and direction are correct   Connect with power supply(9V battery or 5.5V-12V external DC power supply) instead of connecting with M328 and the   LCD. Then measure the voltage between pin 7 and pin 22 with a multimeter. If the voltage is +5V, it means the meter is     working in normal condition   Cut off the power supply, connect with M328 and the LCD. When all installation finished, connect with the power supply Package Includes: 1 x Transistor Tester DIY Kit