USB Tester 4-28V 7A LCD USB A&C Voltage Current Tester Multimeter, Fast Charge Detection Trigger Capacity Ripple Measurement, PD2.0/PD3.0,QC2.0/QC3.0

Pros:1) Nice metal case with easy to use controls2) Excellent, bright and clear display, with auto-rotate3) Loads of technical capabilities4) Nice storage box to keep the unit protected5) Companion Windows app (NOT macOS) is nicely done, and turns this into a capable testing and measurement device.The only con is the documentation, which is a bit lacking. I had to go to YouTube to learn how to upgrade the firmware (which was necessary because the unit displayed incorrect temperature readings).All in all though, if you're reasonably technically savvy, there won't be any significant issues.Recommended!The manual and firmware are available at the FNIRSI website.

I bought the FNB58 as I'm into small electronics and wanted a tester to test cables, chargers, etc. This thing does it all. From simple voltage/current/wattage readings to battery capacity measurement and fast charge protocol control, there's not much else you could possibly need. The feature set is incredible, and the UI is easy to use, although the manual isn't really much help: I looked to YouTube reviews and tutorials to learn how to use it:Pros:Small form factor, large displayPhysical buttons have great tactile feelingMeasures and tests just about everythingCons:Manual is pretty much useless.More expensive than others (but with better features so that's expected)No internal battery (some functions will require a seperate cable and brick to power the device).There is a different variation of the FNB58 with Bluetooth and an app for your phone. The casing on the Bluetooth model is a lighter blue/grey, as opposed to the black casing this one has.I have not tested any PC connection features, as I don't really have the need to.2 warnings:1. If you are using any fast charge feature, make sure you know what you're doing, as it is possible to send high voltage to a device and fry it. There is a warning when entering the menu reminding you to unplug anything connected to the output.2. Flicking the PD COM switch to on will connect the power from all the ports except the PC micro-USB on the top. When using a feature like PD listener, you should power the device with the PC micro USB port, as it's isolated from the rest of the circuitry. One review I saw didn't do this and sent 20v from a laptop charger into a 5V battery pack. Fortunately the battery pack had over voltage protection, but it's not a risk worth taking.Overall, for the hobbyist with the budget, or the professional repair technician, the Fnirsi FNB58 is a great package that you won't be disappointed with.

Produto de excelente qualidade, ótimo acabamento e muito preciso

We have too many cables and I get anxious at the thought of throwing away the good ones and keeping the bad ones. All cables are definitely not made alike. They can impact charging speeds, data rate speeds, protocols supported (eg. video out or not) and overall durability. With that tool, I quickly test and send the bad ones to the electronic recycling center. Less e-waste if I can help it and I keep my drawers clean!!Massive game changer that I recommend to any tech enthusiast!

So much information is given, and it's very nice. Displays voltage to 6 decimal places, which I did not think was possible for this price range. I have not tested very much, but voltage and current seems to read like a $2,000 multimeter