Connected Detector -Lcd Usb Voltmeter Ammeter Power Voltage Tester Current Detector Highlights Generic Brand Lcd Usb Voltmeter Ammeter Power Voltage Tester Current Detector Description: Measure the voltage of a USB powered device when empty or charged Detect voltage and current when USB terminal is working Simultaneous display voltage and current data, easy to read Can detect multiple power supply output voltage and current USB line quality detection, with current calibration precision, higher current accuracy specification: Voltage input/output 3V-9V Voltage resolution: 0.01V Input/output current: 0A-5A (recommended range 0-3A) Current resolution: 0.01A Accuracy: 1% Line loss: about 0.1 ohm Test content: voltage, current Communication function: Yes Data calibration function: Yes Package includes: 1 piece LCD USB voltmeter ammeter