This paragraph tester， can test current， voltage， discharge capacity， and perfectly compatible USB data Sync & charging function， most importantly， he also incorporates high-end smart chip fast charging discrimination ， with this tester， All chargers， compatibility issues do not exist in your home， you can fast charge， and see accurate results.Basic parametersInput voltage range: 3 ~ 15VInput current range: 0 ~ 3.5AVoltage measurement error: 4 ~ 6V when ± 1%Current measurement error: 50 ~ 3500mA time， ± 1%Maximum capacity value: 99999 mAhCan store values: 9Dimensions:64.5*27.5*15.5mmMore details， please refer to the instructions.