Features: It is a series resistor inside capacitor, using 100kHz to the impedance 1/(2xpixFxC). The impedance become small, and we can then measure the true series resistor value. Using this theory, we can measure the capacitor is bad/ damaged or good in condition. Our ESR meter only applies less than 15mV DC or peak to peak on a good capacitor, as a result we can use it as in circuit test. During repairing TV, LCD, Audio board, etc. we can in circuit testing the capacitor is good or not. Dual terminal, for fast and easy inspect general capacitor or resistor, a printed ESR table for fast check. Specifications: ModelMESR-100Range Accuracy (After Zero, tested with 1,10,100R resistor) Refresh Time (Manual Mode) xAuto mode take 0 to 2s more time depend on value 0.000 to 1.000R 1percent+2Digit 0.4s 1.000 to 10.00R 1percent+1Digit 0.4s 10.00 to 100.0R 2percent+1Digit 0.4s Accuracy Up to 1percent (detail on above table) Wide Measurement Range: 1uF (for 0.1uF the error will be larger on equation 1/(2xpixFxC) @ 100Khz ) High Resolution 4 digit, or 0.001Ohm @ 1 Ohm range Measuring voltage 40mV RMS (TESTING VOLTAGE) Clamping voltage