Keweisi KWS-V20 USB Tester | LCD Digital Current Voltage Doctor Capacity Tester | Voltmeter Ammeter

3 in 1 Battery Tester Voltage Current Detector Mobile Power Voltage Current Meter USB Charger Doctor.
Product details of 3 in 1 Battery Tester Voltage Current Detector Mobile Power Voltage Current Meter USB Charger Doctor
Input USB
RTZ, Reset button, press it three seconds will Reset
Out USB
Voltage: 4V-20V ( 1% accuracy )
Current: 0-3A ( accuracy of 0.4% )
Battery Capacity (0-99999mah)
Working time (0-99Hour)
The working time and Capacity have Memory function when power off

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