One-click measurement operation, automatic shutdown after delay. The shutdown current is only 20nA, supporting battery operation. Supports measurement of two resistors, and the potentiometer can also be measured. If the potentiometer is adjusted to one end of the device, the tester cannot distinguish between the pins in the middle and the ends. The resolution of resistance measurement is 0.1 ohm, and the highest measured value reaches 50M ohm. Automatically detects PnP and Npn bipolar transistors, N and P channel Mosfets, Jfet field-effect transistors, diodes, dual diodes, thyristors, resistors, capacitors, and inductors. Automatically detects pin definitions. Measures the current amplification factor (B) of the bipolar transistor and the turn-on voltage (Uf) of the emitter junction. Transistors can be identified by their high threshold voltage and high current amplification factor. The capacitance measurement range is from 25pf to 100mf (100,000uF). The resolution can reach 1Pf, and the inductance measurement range is 0.01mH-20H. Otherwise, it will be displayed as a resistor. If the DC resistance value of the inductor is higher than 2100 ohms, it will also be displayed as a resistor. When testing the capacitor, the Vloss displayed on the screen means loss and damping. The larger the value, the closer the capacitor is to being scrapped. ESR is impedance. The smaller the value, the better the capacitor performance. The protection diodes inside bipolar transistors and Mosfets can be detected and displayed on the screen. It can detect the equivalent series resistance (ESR) of capacitors above 2uF with a resolution of 0.01 ohm. This function is very important for testing capacitor performance. It is possible to display the correct direction sign for both diodes, as well as the forward voltage drop. Measures the threshold voltage and gate capacitance of Mosfet. The LED is detected as a diode, and the forward voltage drop is higher than the normal value. Dual LED detection is a dual diode. The LED flashes during detection. The time for each test is about two seconds, only capacitance and inductance measurements take longer. Description: Power Supply: DC9V (you need to bring your own 9V laminated battery 6F22) Simple Operating Instructions: Connect pins 1, 2, and 3 at will, automatically identify the type, automatically detect the pin sequence, graphically display, and automatically measure parameters. Test Item Description: 1. Transistor Range: Transistors composed of less than 2 (including 2) Pn junctions, and have no other resistor capacitor components inside. 2. Resistance Measurement 0.5-50M ohm 3. Inductance Measurement 0.01mH-20H 4. Capacitance Measurement 25pf - 100000uf Note: Different batches may have differences in product appearance, color, and printed characters, which does not affect the use. Material: ABS Color: As shown Package Contents: 1 x Transistor Tester 1 x Socket 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 be a little different from the real thing. The measurement allowed error is +/- 1-3cm.