







⚡ Power up your tech IQ with FNIRSI’s ultimate USB tester — don’t get left behind!
The FNIRSI FNB58 USB Tester is a professional-grade, multi-interface device designed for precise voltage, current, and fast charge protocol detection. Featuring a 2.0-inch full-color TFT display with auto-rotation, it supports USB-A, Micro-USB, and Type-C ports. Equipped with a 16-bit ADC and PD protocol chip, it accurately measures power metrics, cable resistance, ripple, and temperature while automatically triggering and monitoring major fast charging standards like QC and PD. Ideal for tech-savvy professionals ensuring optimal device and charger performance.











| ASIN | B0BJ253W31 |
| Best Sellers Rank | #105,585 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #521 in Multi Testers |
| Brand Name | FNIRSI |
| Color | silver |
| Customer Reviews | 4.4 out of 5 stars 556 Reviews |
| Included Components | USB Tester |
| Item Weight | 0.1 Pounds |
| Manufacturer | FNIRSI |
| Maximum Operating Voltage | 28 Volts |
| Measurement Type | Voltage, Current, Fast Charge Detection, Etc |
| Minimum Operating Voltage | 4 Volts |
| Model | FNIRSI-001 |
| Power Source | USB Powered |
| Specification Met | Ul, Iec |
| Style Name | Modern |
| Upper Temperature Rating | 40 Degrees Celsius |
W**N
não tem bluetooth
Produto de excelente qualidade, ótimo acabamento e muito preciso
A**.
✅ Accurate, compact, efficient and sufficient
I am providing an overall comment for three USB testers, all of which deserve to be purchased as they complement each other perfectly and are consistent in their results. I would like to dedicate the majority of this review to the Bit Trade One model, which has recently arrived on Amazon. It deserves a shoutout because the tool is exceptional and inexpensive for what it offers. The ADUSBCIM is a USB cable tester that truly complements traditional USB cable testers. Only the cable to be tested needs to be plugged into the A and B ports, and the tool does the rest. The reference value for calculating the cable's resistance is taken using a CR2032 battery, and I note that the calculation is very precise and stable. You can find on Bit Trade One's ADUSBCIM GitHub page, in the Pull Request section, a manual in English in PDF format. This is my small contribution to the project, as the current official English manual is more of a word-by-word description that is difficult to understand. Thanks to this tester, I discovered, for example, that Anker cables, the 765 series, were actually poor high-resistance cables, and that I had much better options for charging. I ended up wasting money on cables that turned out to be slower than cables that were given to me for free with computer accessories. The FNIRSI FNB58 is a very comprehensive USB-A and USB-C port tester. It notably offers numerous rapid charging protocol tests, can test the quality and resistance of a cable, and obtain oscilloscope-like graphical representations. Now that we are on PD3.0 and with PD3.1 approaching quickly, owning one of these tools is now essential to validate the proper functioning of an installation. I've read a lot of advice on Reddit, and if you're looking to equip yourself with the best products offering the most testing possibilities, here are the tester references to get: - Bit Trade One ADUSBCIM (very thorough cable tester testing all the lines of a cable) - FNIRSI FNB58 (the most comprehensive, many ports, many scenarios, USBA/C Micro) - ChargerLab KM003C (the most modern, TB4, 250W) If you have these three or at least a combination of the cable and usb tester, it will take you no more than a few days to become a USB expert. 👌
E**E
Excelente , cumple con lo publicado,
Excelente , cumple con lo publicado,
A**.
doesnt display mah
Doesnt display mah which is what i needed this for. Displays absolutely everything else but. Annoying it doesnt show basic mainly used use case of battery capacity, but makes you work it out from other measures. Has many screens, not on any of them, cannot set it to display mah, very hard to use overall vs many other similar products - so expensive and got a lot of stuff i dont need with it, and not the basic function i do need.
B**P
Top in the market
Excellent product
Trustpilot
3 weeks ago
1 month ago