This little guy is worth his weight in gold! Ever had to troubleshoot power issues with a USB device? Ever wanted to charge your tablet and weren't sure you had the right USB adapter? How about the ability to see exactly how much current a device is drawing from your USB port? This compact USB tester is the tool you've been looking for.
The V20 has a USB A Plug on one end and a USB A Jack on the other. Simply add it inline with your USB device and let the brilliant OLED display answer all of your USB power related questions. The display shows three valuable readings; USB Voltage, Current being drawn by your USB device, and Capacity. Lastly in the upper right hand corner the device shows you the time connected.
At this low price, why not buy three! Once you have one of these guys you will want one in your tool bag, laptop bag, your home desk drawer, and anywhere you utilize USB as a power source.
Click here to check out our 3-Pack.
Specifications:
UPDATED 12/13/2016 - COLOR: Gray
Voltage Range: 3V-9V
Current Range: 0-3A
Accuracy: 1%
Time: 0-99 Hours
USB Compatibility: USB 2.0 and USB 3.0 (works at 2.0 Speeds)
Dimensions: 2.75in x .91in x .59in (70mm x 23mm x 15mm)
Weight: .53oz
Sampling Resistance: 50mΩ
Measurable Capacity Range: 0-99,999mAh
Current Consumption: <12mA
Display Type: 1.04in OLED Screen
Display Color: White
Designed By: Keweisi
Quantity Included: 1
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Great tool 
USB 3-in-1 Voltage/Current/Capacity Meter 