2Pcs USB Meter Tester LCD DC Digital Blue and Red Display Current Voltage Meter Multi-Function Tester Ammeter and Voltmeter Doctor Capacity Tester Power Indicator
 
Product Features
  

         
USB voltage and current tester can display voltage and current data at the same time, can detect a variety of power supply output voltage and current.
         
The input and output voltage of the tester is 4V-30V, and the voltage resolution is 0.01V.
         
The input and output current of the USB meter is 0-3A, and the current resolution is 0.01A.
         
USB male plugged into a 5V charger, female socket plugged into a cell phone and other devices, you can directly read out the voltage and current parameters.
         
USB current detector can measure the power supply or power consumption of cell phone charger, U disk and other products.