This portable voltage capability tester can help you to test MOS, triode, IGBT, diode, zener diodes, diode bridges Max. voltage capacity. It is easy to operate and test. The voltage and current adjust buttons allow you to adjust to the correct voltage and current to different tested objects. If you are looking for this product, just have a try. Features: The output voltage is direct current 120~2700V, you can turn the voltage adjust button clockwise to make the voltage bigger and counterclockwise to make the voltage smaller. The output current is 0.2~3.8mAh, you can turn the voltage adjust button clockwise to make the current bigger, and counterclockwise to make the current smaller. When testing MOS tubes, transistors, and Zener diodes, it is recommended to adjust the current to the minimum scale of 0.2mA. When testing the LED back light board, it is recommended to adjust the current to the maximum scale of 3.8mAh. Portable Size: The small size of this tool is very convenient for everyday use, you can carry it in your tool bag without taking up too much storage space. Built-in 3.7V large capacity lithium battery to supplys power, and you can recharge it through the Type-C interface in time. Wide Applications: This tool can be widely used for testing MOS, triode, IGBT, diode, zener diodes, diode bridges max. voltage capacity, capacitor and varistors' voltage verification, LED backlight and light board testing, etc. Specifications: Material: ABS Color: red, blue (optional) Output voltage: direct current 120~2700V Output current: 0.2~3.8mAh Battery: 1 * 3.7V lithium battery(included) Recharge port: TYPE-C Package size: 130 * 80 * 40mm / 5.1 * 3.1 * 1.6in Package weight: 175g / 6.2ounce Packing List: 1 * Transistor Withstand Voltage Tester with Test Pen