- True 100 kHz ESR testing: measures capacitor internal resistance using a true 100 kHz sine wave, following the capacitor manufacturer test method. - In circuit capability: supports online testing on circuit boards for quick verification without removing components. - Fast and reliable: dual terminal blocks enable easy connections; enables rapid checks and improves test speed versus typical battery testers. - Wide range and accuracy: ESR measurement range 0.001 to 100.0 ohms with up to 1% accuracy; designed for stable performance in varied environments. - Broad compatibility: suitable for common capacitor types used in household appliances, professional development boards, and DIY projects. - Use scenarios: repair and maintenance of household appliances to confirm capacitor ESR; PCB development and testing in engineering environments; DIY electronics projects and hobbyist repairs.