1. Measure voltage current ampere watt the average voltage dynamic voltage and current curves plotted. 2. Using dot matrix OLED display 3. True 5-digit precision current capacity table Coulomb gauge precision measuring capacity based on current integration 4. Display voltage current data 5. High-resolution current 0.0001A (0.1mA). 6. Click the button for four screens display data 7. Performance: - Voltage Range: 3-6.3V (anti-reverse). - Voltage Resolution: 0.01V (10bit). - Voltage Accuracy: 1% + 1d. - Current Range: Continuous 0-3A instantaneous maximum 12A (continuous over 3AUSB mouth can not afford Ha). - Current Resolution: 0.0001A (0.1mA 18bit). - Current Accuracy: 0.5% + 1d (when shipped by 0.1% calibration beating within ± 0.1mA). - Capacity range: 0-400Ah 0-400Wh. - Capacity Resolution: 0.0001Ah 0.0001Wh (0.1mAh 0.1mWh). - Capacity Accuracy: Ah stalls 0.5% (0.1% when shipped by calibration) Wh file 1%. - 128 * 32 dot matrix OLED. - Refresh rate: 0.36 seconds / second. - Clock Accuracy: 0.001%. PCB Size: - Line Loss: A total of about 50 milliohms.