Specification: Input / Output voltage: 4V-30V Voltage Resolution: 0.01V Input / Output Current: 0A - 3A Current Resolution: 0.01A Test Capacity Range: 0-19999 mA Accuracy: Plus or minus 1% Line Loss: 0.1 oh or so Test Content: Battery voltage, Current, Discharge capacity (a total of 10 sets of data) Communication Function: Yes Data Calibration Function: Yes Package Weight: 28g Quantity: 1pc Package included: 1 x SB Current Voltage Capacity Tester High Quality Performance: This ammeter and voltmeter can display voltage, current and mAH data at the same time, which is convenient for viewing, and can detect the mAH output of the mobile power supply. Data Storage: The battery capacity tester can store multiple sets of detection data, and save the function when power off. Does not affect data transfer, more precisely, the current parameters do not bounce. High Current Accuracy: The current sampling is 25 milliohms, the loss is smaller, and the precision current calibration function is provided, and the current accuracy is higher. Measurable Quality: Dual power supply for USB male and Micro USB ports, which can detect the quality of Micro USB cables. Excellent After-sales: If you have any questions, you can contact us at any time, we will solve it for you as soon as you see it, and try our best to provide you with satisfactory service.