FNIRSI FNB58 USB Tester is a multi-functional tool designed to monitor and measure USB power parameters, with two available versions—one featuring Bluetooth for wireless data transmission and another without. Both versions provide real-time measurement of voltage, current, power, and more, making them invaluable tools for testing chargers, cables, power banks, and USB-powered devices. Below is a technical description for both versions:

1. Display:

• Type: 0.96-inch IPS LCD color display with a wide viewing angle.
• Resolution: High clarity for multiple parameters displayed simultaneously.
• Interface: User-friendly layout with real-time data.

2. Measurement Capabilities:

• Voltage: 4V to 30V (±0.01V accuracy).
• Current: 0A to 5.1A (±0.001A accuracy).
• Power: 0W to 150W.
• Capacity: 0 to 99999mAh.
• Energy: Measured in watt-hours (Wh).
• Resistance: Calculates load resistance based on current and voltage.

3. USB Ports:

• Input and Output Ports: USB Type-A and USB Type-C for wide compatibility.
• USB Type-C (Bi-directional): Measures in both input and output directions.

4. Protocol Triggering:

• Supports Power Delivery (PD), Quick Charge (QC 2.0/3.0), and other fast-charging protocols, making it versatile for various USB devices.

5. Bluetooth Version Features:

• Wireless Data Transmission: The Bluetooth-enabled version allows real-time monitoring and data transfer to a smartphone or PC via a dedicated app. This feature is useful for logging and analyzing data over time, especially during long testing sessions.
• App Functionality: The app enables remote viewing of voltage, current, and power usage, and stores logs for later analysis.

6. Data Logging & Memory:

• Both versions feature data logging to monitor total power usage, capacity, and energy consumption.
• Bluetooth Version: Offers wireless data logging and export, while the non-Bluetooth version only supports on-device display.

7. Accuracy & Sampling Rate:

• High precision with fast sampling rates for real-time data display.

8. Safety Features:

• Over-Voltage/Over-Current Protection.
• Reverse Polarity Protection.

9. Physical Design:

• Compact, portable form factor with robust plastic housing.
• Bluetooth Version: Same physical dimensions but includes a Bluetooth module for wireless communication.

10. Additional Features:

• Temperature Monitoring.
• Backlight Control.
• Port Identification.

11. Use Cases:

• Charger and cable testing.
• Power bank performance verification.
• Battery diagnostics.

12. Package Contents:

• 1 x FNIRSI FNB58 USB Tester (Bluetooth or Non-Bluetooth version).
• 1 x User Manual.

The Bluetooth version provides added convenience for professionals and enthusiasts who need to monitor USB power metrics remotely, while the non-Bluetooth version offers the same precise measurements at a lower price point.