The FNIRSI FNB58 is a USB tester for measuring voltage (4–28 V), current (0–7 A) and power (up to 120 W). Has USB-A, USB-C and micro USB connectors and a 2.0″ color display.
On set, it checks whether a power bank or USB-C PD output supplies the power needed for a monitor, light or camera. It recognizes PD 3.1, PPS, QC and other protocols.
Ideal for
Why FNIRSI FNB58 USB Tester
- Wide range – Measures up to 28 V and 7 A.
- Protocol detection – Recognizes PD, PPS, QC and others.
- Three connector types – USB-A, USB-C and micro USB.
- Clear display – 2.0″ color TFT.
Key specs
| Type | Tool – USB tester |
|---|---|
| Dimensions | 42 × 13 × 82 mm |
| Payload / capacity | Measures 4–28 V, 0–7 A, 0–120 W |
| Power | From the measured USB port |
Functions
| Connectors | USB-A, USB-C, micro USB |
|---|---|
| Protocols | PD 2.0/3.0/3.1/PPS, QC 2.0/3.0, FCP, SCP, AFC, PE, VOOC |
| Display | 2.0″ color TFT |







