BESTOPE Dual-USB Output Charging Detector Digital LED Ammeter Voltmeter Guage DC Display 3.2-10V 0-3A Red/Blue USB charging voltage and current dual display, One-input , Dual-output;Data communication function Simultaneously displaying of Amp and Volt in real-time Measuring Range: Voltage 3.2 ~ 10V; Current 0 ~ 3A; Accuracy: 1% ( 2 digits) USB Output Port 1 is used for both charging and USB communication USB Output Port 2 is used for charging only