Description
FR FNB48P USB Tester
The FR FNB48P USB Tester is a multifunctional USB voltage and current meter that helps you test the performance, safety, and health of USB ports, charging cables, and power banks. With support for USB-A and USB-C, this tool displays real-time data on voltage, current, capacity, power (W), resistance, and temperature on a vibrant LCD screen.
Whether you’re a tech repair professional, electronics hobbyist, or just want to monitor your phone’s fast charging behavior, this FR FNB48P USB Tester compact device is perfect for diagnosing and verifying USB charging systems.
Its multi-page display, data logging, and protocol detection features make it one of the most advanced testers available in its class.
Key Features:
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✅ Supports USB-A, USB-C, and Micro USB input/output
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Real-time display of voltage (V), current (A), power (W), energy (Wh), resistance (Ω), temp (°C)
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Bidirectional USB-C Testing
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Data recording, overvoltage/current alert, and cable quality testing
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Supports multiple fast charging protocols: PD, QC, SCP, AFC, FCP, Apple 2.4A, etc.




