KWS - V21 QC2.0 LCD Digital USB Charger Power Bank Meter Voltmeter Current Detector Test Table Main Features:● Real time monitoring, support QC2.0● Input port connected to output port● Out port connected to USB data cable port● Reset clears key, press 3 - 5 seconds after the screen is cleared● Can test USB charging current, voltage, discharge capacity, intelligent devices● Input voltage display : 4 - 20V● Charge current display: 0 - 3A● Battery capacity display: 0 - 99999 mAH● Working time display: 0 - 99 Minutes● Current resolution: 0.01A● Accuracy: 1 percent● Work time and power capacity display with memory function● Can be very easy to find digital devices charging problem Model: KWS - V21Special function: Real time monitoringMaterial: ABS Package weight: 0.054 kgProduct size (L x W x H): 7.50 x 2.50 x 1.50 cm / 2.95 x 0.98 x 0.59 inchesPackage size (L x W x H): 13.50 x 7.50 x 2.50 cm / 5.31 x 2.95 x 0.98 inchesPackage Contents: 1 x QC2.0 USB Voltage Current Capacity Tester