1pc USB Charger Doctor Voltage Current Detector Meter QC 2.0 3.0 Battery TesterProduct Features:This USB Charger Doctor can test your PC， Laptop， Cellphone， Charger， Car Charger， Power Bank ect.It's new design make it can support Quick Charge 2.0/3.0 ( QC 2.0/3.0) 5V 9V 12V 20VThe working time and Capacity have Memory function when power offReset button ， press it 3-5 seconds it will ResetProduct Description:Items Type: Digital USB Current Voltage Tester MeterDisplay data: Voltage， Current， Capacity， TimeInput/ Output Voltage: 4-20V ( 1% accuracy )Voltage resolution: 0.01VInput/ Output Current: 0-3A ( 1% accuracy )Current resolution: 0.01ABattery Capacity: 0-99999mAhWorking time: 0-99HourSize(L x W x H): Approx. 5.9cm(Include USB is 7.3cm) x 2.3cm x 1.4cmPackage including:1 x USB Charger Detector