1. The output voltage is DC 120~2700V. You can turn the voltage adjustment button clockwise to increase the voltage, and turn it counterclockwise to decrease the voltage. 2. The output current is 0.25~3.4mAh, you can turn the voltage adjustment button clockwise to make the current larger, and turn it counterclockwise to make the current smaller. 3. When testing MOS tubes, transistors and Zener diodes, it is recommended to adjust the current to a minimum scale of 0.25mA. When testing LED backlight panels, it is recommended to adjust the current to the maximum scale of 3.4mAh. 4. Portable size: The small size of this tool is very convenient for daily use, you can carry it in the tool bag without taking up too much storage space. 5. Wide range of applications: the tool can be widely used in MOS, triode, IGBT, diode, Zener diode, diode bridge maximum voltage capacity test, capacitor and rheostat voltage verification, LED backlight and lamp board test, etc. Notice: 1. Do not use it to test high-voltage electrolytic capacitors such as 450V/220UF. It is possible to test low-voltage capacitors such as 2200UF/35V. 2. If there is no output voltage when the red high-voltage start button is pressed, it is likely that the lithium battery voltage is lower than 3.1V, and the tester cannot be powered on, and it needs to be in time. 3. Only when testing and Zener diodes, the output current can be adjusted to the maximum value, and for testing other components, the output current can be adjusted to the minimum value to avoid damage to the components Material: plastic colour: Package Contents: 1 x Triode Voltage Capability Test set With battery 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.