FNIRSI Test & Measuring Module
FNIRSI-FNB58 USB QC/PD Voltage and Current Meter Tester Type-C Multi-functional Fast Charging Tester HD Screen Display Human-Computer Interaction Cable Detection Measure Module
Questions and Answers
I cannot find the App on the Apple AppStore. How is it called there? As I do not have any Android devices the APK is not helpful for me.
I am not able to post the company website here. Look up fnirsi in your search engine.
FNB5B or FNB58
you can Google fnirsi and go to their website. you will be able to download the apk and pc suite and manual from there.
Reviews
holecsko
on 13 August 2025
The device works very well, it can do much more than the cheaper Chinese clones. It not only outputs the protocols but can also test the cable's E-marker chip and shows the impedance as well. The current flow is much better than the weaker versions - for example, with an original 120 W Xiaomi charger, I previously measured max. 65 W, but with this one, I measured ~73 W, even though the phone was only at 15% and was not cooled. The menu system is detailed but transparent. Values can be monitored via a phone app or PC via Bluetooth. Interestingly, the microUSB-B connector is linked to the USB-C section on the PC, not on a separate USB-C port. A small peculiarity: when testing a USB-C cable with an E-marker chip, the PD Key switch must first be set to OFF, go into the cable test menu, plug in the cable, and then switch to ON - this way it reads the data correctly. Overall, a very precise little device with many functions that I am still discovering, but I am already completely satisfied with it.
AtisH
on 06 April 2025
The delivery took about 10 days. Assembly and packaging are good. Its measurements are correct, matching reality. Bluetooth connects quickly. It can be connected to a computer via micro USB cable, and the firmware update also goes through this. I am satisfied with the promotional price and the product.
BG454171720
on 29 January 2025
I have just unpacked it and I am pleasantly surprised, this is the first time I have bought something from FNIIRST. A very well-cared product. I have tried it briefly with a 120W mobile charger and the amount of information it provides is spectacular. Even without reading the manual, its use is very intuitive and illustrative. A complete success.
ionize
on 12 December 2024
This is a great USB tester with many functions. The packaging is great and the box feels premium. Works really great. Still I need to update the firmware to latest version as you can see from the SUMSUNG typo in protocol detection.
lomgkoq
on 23 August 2024
Useful and complete instrument for these new multi-voltage chargers.
lazok80
on 24 April 2024
It arrived undamaged and quickly. A great USB device with an excellent display! I still have to study it because it knows a lot and I will update the firmware. It was worth the cost!
JugaadGR
on 10 April 2024
Amazing tool, worth every penny. _Great interface and tons of functionality._No manual in the packaging, but you can download it from Fnirsis website.
dloreg
on 05 December 2023
Very useful tool for measuring USB devices. Fast shipping as usual from Banggood..
andrandr
on 14 November 2023
Very multifunctional device. It came in great condition. Surprisingly, there was no instruction manual in the box. 🙄 Using the QR-code on the box or following the link www.fnirsi.com.cn/support you can download the manual, the program for updating the firmware, and the firmware themselves as they appear, and the mobile app Bluetooth - access and control for Android. It's a great device. I recommend it.
gfinstrum
on 21 August 2023
Very fast delivery ten days, basic packaging, but material arrived in good condition and functional, it corresponds exactly to the description of the shop, very satisfied with the product, in line with my expectations. Thank you.
