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Item #:
245009225
FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C
86% of respondents would recommend this to a friend
Item #:
245009225
USD 75
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FNIRSI FNB58 USB tester is a high-reliability, high-safety USB voltage and current detection meter and a mobile communication terminal fast charging trigger which can be used to measure the power supply or power consumption of products such as USB interfaces, mobile phone chargers, and U disks.
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What Stands Out
Versatile Compatibility
Supports multiple protocols including PD and QC, allowing seamless compatibility with various USB devices for efficient charging and data transfer.
High Power Capability
With a maximum output of 28V and 7A, it efficiently handles high-power devices, making it suitable for modern electronics that require fast charging.
E-Marker Functionality
The integrated USB-C E-Marker reader provides accurate performance data, ensuring optimal charging efficiency and safety, setting it apart from standard USB testers.
Product Details
- 2.0-inch full-color ultra-wide viewing angle TFT LCD display with integrated USB-A, Micro-USB, Type-C interface
- Multifunction USB tester with external 16-bit ADC, PD protocol physical chip
- Supports trigger detection of various fast charging protocols such as QC2.0/QC3.0, FCP/SCP, AFC, PD2.0/3.0, VOOC/WARP, Super VOOC 1.0/2.0
- Parameter detection and recording including voltage, current, power, resistance, capacity, temperature, D+/D- voltage, and waveform drawing
- Additional functions include internal resistance measurement, E-Marker Cable chip reading, DASH Cable data reading, and onboard temperature measurement
- Environmentally friendly with electronic manuals available for download on the official website, along with firmware and software updates
| Power Source | Battery Powered |
| Minimum Operating Voltage | 4 |
| Upper Temperature Rating | 40 u00b0C |
| Measurement Type | Voltage, Current, Fast Charge Detection, Etc |
| Compatible Devices | USB interfaces, mobile phone chargers, U disks, mobile phones, mobile power supplies, USB-A, Micro-USB, Type-C devices from various brands |
| Style Name | FNB58 |
| Color | multi-color |
| Item Weight | 1.6 ounces (45.36 grams) |
| Specification Met | Ul, Iec |
| Brand Name | FNIRSI |
| Model | FNIRSI-001 |
| Unit Count | 1 Count |
| Number of Items | 1 |
| Item Highlight | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger, App/PC Software |
| Manufacturer | FNIRSI |
| Number of Packs | 1 |
| Included Components | USB Tester |
| Part Number | FNIRSI-001 |
| Brand | FNIRSI |
| Style | FNB58 |
Who Should Buy?
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Tech Enthusiasts
Ideal for users who want to analyze power delivery and quickly identify voltage and current levels in their devices.
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Mobile Developers
Perfect for developers who need to optimize charging speeds and ensure compatibility with various USB power delivery protocols.
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DIY Electronics Hobbyists
Useful for hobbyists looking to build or test custom charging solutions with USB-C and USB-A connections.
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Casual Users
Not ideal for average users who require a simple charger and do not need advanced power analysis features.
Product Description
FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C
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Customer Questions & Answers
-
Question:
What is the maximum voltage and current the FNIRSI USB Tester can handle?
Answer: The FNIRSI USB Tester can measure voltages from 4V to 28V and a maximum current of 7A. This range makes it versatile for testing various devices, including power banks, chargers, and mobile devices. This capability is ideal for users looking to ensure that their devices are charging efficiently without exceeding voltage and current ratings, which can be particularly useful for technicians or hobbyists involved in DIY electronics. -
Question:
Does the FNIRSI USB Tester work with both USB-A and USB-C connectors?
Answer: Yes, the FNIRSI USB Tester is equipped with both USB-A and USB-C connectors. This dual compatibility allows you to test a wide range of devices, from older gadgets to the latest smartphones. Whether you're performing diagnostics on a traditional laptop charger or assessing a high-speed USB-C cable, this tester provides the flexibility needed to cover diverse user requirements. -
Question:
How does the fast charge detection feature work?
Answer: The fast charge detection feature automatically identifies and displays whether a connected device supports fast charging protocols. This ensures users can optimize charging time and efficiency. By showing real-time voltage and current readings, it allows users to select the right charger and cable combination for devices like smartphones and tablets that support quick charging. -
Question:
What kind of app software does the FNIRSI USB Tester use?
Answer: The FNIRSI USB Tester comes with an accompanying app that enables users to monitor and log data from the tester on their smartphones. This app provides additional metrics such as capacity, ripple, and average power consumption over time. By using the app, you can gain deeper insights into your charging processes and make informed decisions about your devices’ performance. -
Question:
Can this tester measure ripple and capacity?
Answer: Yes, it can measure both ripple and capacity, providing users with critical insights into the performance of their chargers and power banks. Ripple measurement helps identify any fluctuations in the power supply, while capacity readings let users know how much charge has been provided over time. This information can be essential for professionals testing for compliance or anyone wanting to ensure their devices are performing optimally. -
Question:
Is the display on the FNIRSI USB Tester user-friendly?
Answer: The FNIRSI USB Tester features a clear LCD display that shows real-time measurements, making it easy for users to interpret the data at a glance. The information presented includes voltage, current, and overall power usage. An intuitive display is crucial for quick diagnostics, allowing users to adjust settings or change connections swiftly based on the readings provided. -
Question:
What types of devices can I test with this multimeter?
Answer: You can test a variety of devices with the FNIRSI USB Tester, including smartphones, tablets, laptops, power banks, and wall chargers. This versatility is particularly useful for anyone in need of a reliable tool for checking the health of their charging equipment or for DIY enthusiasts building their own electronic devices. It guarantees that you're using compatible power sources to maintain device longevity and performance. -
Question:
Is it portable enough for travel?
Answer: Absolutely! The FNIRSI USB Tester is compact and lightweight, making it an excellent choice for travel. Its portability allows users to carry it in a laptop bag or purse easily, ensuring that you can monitor and test charging devices on-the-go. Whether you're troubleshooting a power issue while traveling or simply ensuring you have the right power source at your destination, this tester is a convenient tool. -
Question:
Where can I buy the FNIRSI USB Tester in El Salvador?
Answer: You can purchase the FNIRSI USB Tester from Ubuy in El Salvador. Ubuy offers a straightforward online shopping experience, allowing you to find the product easily and access detailed information. With competitive offerings and reliable customer service, Ubuy ensures that purchasing your FNIRSI USB Tester is effortless. -
Question:
What materials is the FNIRSI USB Tester made from?
Answer: The FNIRSI USB Tester is constructed from high-quality, durable materials designed to withstand regular use. Its casing not only protects the internal components but also offers a sleek design. This robust construction means that the tester can withstand occasional drops and bumps during use, making it a reliable choice for both home users and professionals in various environments.
FNIRSI Voltage Testers Editorial Review
FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C is an essential tool for anyone dealing with USB-powered devices. It offers a broad voltage and current range, up to 28V and 7A, ensuring comprehensive testing capabilities for various fast charging protocols like PD2.0/PD3.0 and QC2.0/QC3.0. Many users appreciate its accurate measurements of voltage, current, and power, and its bright full-color TFT LCD display makes information easy to read. The tester’s ability to read USB-C cable E-Marker chips is invaluable for ensuring compatibility with higher power requirements, a crucial feature often highlighted in user reviews. However, its complex interface might challenge beginners.
Customer Reviews & Ratings
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Pros
- High accuracy in measurements
- Supports a wide range of USB standards
- Clear, colorful display
- Durable metal build
- Comprehensive testing options available
Cons
- Documentation could be improved for clarity
Platform Trust & Buyer Confidence
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Jasmin
Verified buyer
“Great products and very good service: very easy and very fast international delivery.”
9 September 2026 · via Trustpilot
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“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”
11 September 2026 · via Trustpilot
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“Easy to find and order what you want on the website. Delivery is quick to the UK”
8 September 2026 · via Trustpilot
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USD 75
Order now and get it around Friday, October 02
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Features & Benefits
- 2.0-inch full-color ultra-wide viewing angle TFT LCD display
- Monitor the voltage, current, power, resistance, capacity, temperature, D+/D- voltage
- Support QC2.0/3.0, FCP/SCP, AFC, PD2.0/3.0, VOOC/WARP, Super VOOC 1.0/2.0 triggers
- Six-digit display, 10 sets of switchable capacity, power and time statistics
- Internal resistance measurement, E-Marker Cable chip reading, dashboard cable data reading
- No paper manuals - download from the official website
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