FNIRSI FNB58 USB Tester – Flagship 2.0″ Color Screen Voltmeter Ammeter with PD 3.1 & Bluetooth Support

Overview

The FNIRSI FNB58 is a professional-grade USB power meter that sets a new standard for accuracy and usability. It features a stunning 2.0-inch high-definition LCD that makes reading complex graphs and data points effortless. Encased in a durable aluminium alloy shell, it is designed to handle the high voltages of modern fast-charging standards. Whether you are analyzing PD 3.1 protocols, measuring battery capacity, or performing offline data logging, the FNB58 provides lab-quality results.

Key Features

• Massive 2.0″ HD Display: The largest screen in its class, offering crystal-clear visibility for 6-digit voltage/current readings and real-time wave curves.

• PD 3.1 & 240W Ready: Specifically designed to monitor the latest high-power charging standards, including the Extended Power Range (EPR).

• Automatic Protocol Detection: One-button detection for QC 2.0/3.0, PD, Huawei FCP/SCP, Samsung AFC, and Apple 2.4A.

• Offline Data Logging: Built-in memory allows you to record charging curves without a PC and view them later.

• Precision Internal Resistance: Specialized 4-wire method for measuring cable resistance to identify low-quality charging leads.

• Independent PC Interface: Uses a dedicated Micro-USB port for PC connection, ensuring the testing circuit remains completely isolated and accurate.

Technical Specifications