USB 3.0 Tester, Eversame IPS Color Display Digital Multimeter Voltmeter Current and Voltage Monitor, DC 5.1A/30V/150W Power Meter Tester, Test Speed of Chargers, Cables, Capacity of Power Banks-Black

I wanted a real time meter showing voltage, amperage, and wattage all at the same time for/from USB A plug. It's just what I wanted. While the display is small, it's easy to read. And, you have different display layouts via clicking the button while it's in use.

Have been using for a few weeks now. Very useful gadget once you get the hang of it. Actually dropped mine while it was sticking out of a USB power bank and bent the connector pretty good - gently bent it back in place and still works great.For those of you who (like me) could not find the manual:On the main screen (showing Vol, Cap, Ene, Tme, Cur)- Click and hold to reset all meters- Two clicks will independently reset the mAh meter- Three clicks will independently reset the Wh meter- Four clicks will independently reset the timer- Five clicks (on screen with it visible) lets you configure the countdown timer/cutoff- Six clicks appears to do nothing- Seven clicks will re-zero the ammeter. WARNING: Don't do this with a load plugged in, or your readings will be off - but if you do, just do this again with nothing plugged in. Think of it like the "tare" button on a scale.On the min/max Volts/Amps screens, two clicks increments and three decrements the value.On the "AAA" screen, two clicks will rotate the display - one of my few complaints is that it forgets this setting every time it is powered off!Veified that display works down to ~3v but voltage display never seems to go below 3.10v.

Only dislike is the display readout, it's a little small for my eyesight, I needed my reading glasses to see. (no doubt okay for with good eyesight)...

This compact tool has proven to be indispensable in my arsenal of repair equipment. It's incredibly useful for quickly identifying whether a device is receiving power properly, which saves me a ton of time and frustration. I appreciate its ability to eliminate guesswork by instantly indicating whether there's an issue or not, because I can't stand fumbling around with multiple cables, trying to diagnose a USB problem.However, there is one aspect where it falls short, data passthrough. Not being able to monitor the voltage and amperage while USB devices are in use can be somewhat limiting if want to keep track of fluctuations during use. Nonetheless, considering its affordability and ease of use, this USB Voltmeter remains a fantastic addition to my toolkit.

Handy little device-easy to use. Lets you see how device is charging and that everything is working correcting. Quick easy way to check things as you are building up electronics without having to hook-up a DMM.

This is a fantastic little device with one really bad design flaw. The screen is behind a semi transperant piece of plastic. This works mostly fine indoors. But it's impossible to read outdoors.I ended up ordering one with a transperant case and it works much better. Instead of returning the first one, I ended up using a dremel to cut out a rectangular window around the screen so that I could read it better.

Excellent Little Tester! Wish I could get the same thing in USB-C!However, you could remove the "-USB Tester-" line ( I think we know what we ordered ) and use the space to make the smaller fonts a little larger and easier to read. Also, the red and dark blue colors are difficult to see, especially in well-lighted offices. - ECE Tech

Product is very useful and works very well. The display makes it easy to see how devices are charging and when they complete full charge. I may buy more.

This product bill received very late and non-mention replacement and not update Amazon return policy I am not satisfy wastage of money

El voltaje que marca es aproximadamente 0.5 volts menor al real. Pero nada más. Todo funciona bien.

Works as advertised and has a much broader measurement range than others I have looked at, bonus feature it can plugged in in either orientation

I'll learn its benefits at useReceived it 2 weeks ago

does what it say.