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⚡ Power up your tech IQ with FNIRSI FNB58 — the ultimate USB tester for pros who refuse to guess.
The FNIRSI FNB58 is a compact, battery-powered USB tester featuring a 2.0-inch TFT LCD that monitors voltage, current, power, and capacity up to 28V/7A. It supports a wide range of fast-charging protocols (PD2.0/3.0, QC2.0/3.0, VOOC, Super VOOC) and reads USB-C E-Marker and DASH cable chips. With real-time graphing at up to 4 million samples per second and onboard temperature and resistance measurement, it offers professional-grade diagnostics without requiring any app or PC software.





























| ASIN | B0BS2ZS813 |
| Best Sellers Rank | #103,521 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #78 in Voltage Testers |
| Brand Name | FNIRSI |
| Color | multi-color |
| Customer Reviews | 4.4 4.4 out of 5 stars (185) |
| Included Components | USB Tester |
| Item Dimensions | 3.23 x 1.65 x 0.47 inches |
| Item Weight | 1.6 ounces |
| Manufacturer | FNIRSI |
| Measurement Type | Multimeter |
| Minimum Operating Voltage | 4 |
| Model | FNIRSI-FNB58-bp |
| Part Number | FNIRSI-FNB58-bp |
| Power Source | Battery Powered |
| Specification Met | CE, FCC, RoHS, UL |
| Style Name | FNB58 |
| Upper Temperature Rating | 125 °C |
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