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⚡ Power up your precision game with FNIRSI USB Tester — the ultimate fast-charge whisperer!
The FNIRSI FNB58 USB Tester is a professional-grade USB voltage and current meter featuring a 2.0-inch full-color TFT display, integrated USB-A, Micro-USB, and Type-C ports. It supports advanced fast charge protocol detection including QC2.0/3.0, PD2.0/3.0, VOOC, and more, with ultra-high resolution measurements and comprehensive data logging capabilities. Designed for tech-savvy professionals, it also offers cable chip reading, internal resistance measurement, and temperature monitoring, making it an indispensable tool for precise USB power diagnostics.





























| ASIN | B0BJ253W31 |
| Best Sellers Rank | 191,558 in DIY & Tools ( See Top 100 in DIY & Tools ) 414 in Multi Testers |
| Brand | FNIRSI |
| Colour | black |
| Compatible Devices | USB devices, mobile phone chargers, U disks, USB interfaces, mobile power supplies |
| Customer Reviews | 4.4 out of 5 stars 691 Reviews |
| Included Components | USB Tester |
| Item Weight | 0.1 Pounds |
| Item weight | 0.1 Pounds |
| Manufacturer | FNIRSI |
| Manufacturer Part Number | FNIRSI-001 |
| Maximum Operating Voltage | 28 Volts |
| Measurement Type | Voltmeter, Ammeter, Ohmmeter |
| Min. Operating voltage | 4 Volts |
| Minimum Operating Voltage | 4 Volts |
| Model Number | FNIRSI-001 |
| Power Source | Corded Electric |
| Power source | Corded Electric |
| Specification Met | IEC 1010, UL |
| Style | Modern |
| Style Name | Modern |
| Unit Count | 1.0 count |
| Upper Temperature Rating | 40 Degrees Celsius |
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