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Item #:
210355003
FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs,
88% of respondents would recommend this to a friend
Item #:
210355003
BND 112
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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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Note: Step Down Voltage Transformer required for using electronics products of US store (110-120). Recommended power converters Buy Now.
What Stands Out
Versatile Compatibility
Supports USB A&C devices with fast charge detection, ensuring optimal performance for a wide range of gadgets, from smartphones to tablets.
Real-Time Monitoring
LCD display and app integration provide immediate voltage and current readings, empowering users to track power usage accurately while charging devices.
High Precision Testing
Measures capacity ripple and adheres to PD2.0/PD3.0 and QC2.0/QC3.0 standards, delivering reliable performance insights that help prevent potential device damage.
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 |
| Manufacturer | FNIRSI |
| Included Components | USB Tester |
| Part Number | FNIRSI-001 |
| Brand | FNIRSI |
| Style | FNB58 |
Who Should Buy?
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Tech Enthusiasts
Ideal for hobbyists who want to analyze USB power performance and charging efficiency in various devices.
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Mobile Developers
Useful for developers creating mobile devices that require precise charging protocols like PD and QC.
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Electronics Engineers
Beneficial for professionals testing and measuring power outputs in circuit designs or prototype phases.
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Casual Users
Not suitable for everyday users who need basic charging without technical details or monitoring.
Product Description
FNIRSI FNB58 USB Tester, PD/QC, USB-C E-Marker Reader, 28V 7A, USB-A/C | PD2.0/3.0 & QC2.0/3.0, Voltage/Current/Power Monitoring, Real-Time Graphs, Capacity, Ripple, PD Trigger, App/PC Software
Have any Query? Chat with us
Customer Questions & Answers
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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 Brunei?
Answer: You can purchase the FNIRSI USB Tester from Ubuy in Brunei. 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
The FNIRSI USB Tester 4-28V 7A LCD USB A&C is a multifunctional device designed for tech-savvy users who frequently work with USB hubs, power supplies, and cables. It’s particularly beneficial for those wanting to understand the capabilities of newer USB standards, such as USB 3.2 and Power Delivery (PD) features. Many customers have praised its ability to provide real-time data on voltage, current, and power, allowing users to monitor their devices effectively. One standout feature is the capability to read USB-C cable E-Marker chips, providing insights into the specifications of cables and ensuring users can leverage the full power potential of their adapters and chargers. The Fast Charge Triggering feature allows users to test compatibility with various fast-charge protocols, albeit with a warning for users of sensitive devices. While the FNIRSI FNB58 offers sophisticated monitoring and testing options, some customers have expressed frustration with its documentation. The official manual is critiqued for being poorly organized and translated, making it difficult for users to fully grasp the tool's applications without external guides or personal experimentation. The device also allows for cable resistance testing and has offline recording capabilities, which can be essential for ongoing project work and troubleshooting intermittent power issues. Nevertheless, this product is best suited for those familiar with USB technology, as the learning curve can be steep for less experienced users. **
Customer Reviews & Ratings
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Pros
- Provides real-time monitoring of voltage, current, and power.
- Capable of reading and interpreting USB-C E-Marker chips.
- Fast Charge Triggering feature for various fast-charge protocols.
- Includes offline data logging and recording capabilities.
- Versatile enough to be used as a variable power supply for low-power projects.
Cons
- Manual is poorly organized and difficult to understand.
Platform Trust & Buyer Confidence
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Jazz
Verified buyer
“Easy to use and always helpful and sorts any issues I've had past and present”
1 September 2026 · via Trustpilot
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“The delivery was fast and the product came undamaged and authentic.”
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“Fast, convenient and cheap. Great store!”
27 August 2026 · via Trustpilot
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BND 112
Order now and get it around Tuesday, September 15
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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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