Input voltage: 3V-7VVoltage Resolution: 0.01VTest current: 0.05A-3.50ACurrent resolution: 0.01 ACapacitance range: 0-19999mAHAccuracy: 1%Line loss: about 0.1 ohmsTest content: battery voltage, current, discharge capacity (10 sets of data in total)Bidirectional measurement Tester can be connected to the charging adapter, and also can connect the charging cable plug, easy to find digital devices charging problem existed.Data StorageIntelligent memory data charging capability, monitoring and of memory measurement data, up to 10 sets of measurement data stored, data can be one button to clear, data self-protection is not lost.Smart flashHigh voltage or low voltage will alarm, LCD display arrow, backlight indicator will alarm through flash. Press the button LED screen will be on over 30S.Test RangeImprove charging efficiency, protect electronic equipment, perfect measurement for tablet, cellphone batteries, rechargeable treasures, 5V routers and any other 5V USB digital device, current, voltage and battery capacity. Voltage and current measurement: Connect the USB tester with phone and other devices, then read the voltage and current parameters directly.Clear data:Press and hold the button until (data group) in the button of next group unlock, automatically move to the next data set from scratch.Shipping Quantity: One piece