High Accuracy Measurement The measuring range of the ESR capacitance meter is 0.001 to 100.0 R with a high accuracy of 1%, supporting online measurement. Quick Check of Dual Terminals – Digital capacitance meter with dual terminals, easy to quickly check the internal resistance of the capacitor, and the inserted ESR meter is used for quick check. Professional Capacitance Meter Use 100kHz real sine waves to measure the internal resistance (ESR) of the capacitor, which is consistent with the capacitor manufacturer's test method. With this theory, we can measure whether the capacitor is faulty, damaged or good. Multifunctional capacitor capacitance meter Professional testing of capacitor internal resistance, ESR value, support online testing of PCB, suitable for home appliance repair, professional engineer development and DIY enthusiast use. Large LCD Display - ESR capacitance meters with high resolution 0.001, large LCD display, supports USB power supply, DC5V power supply.