FNIRSI FNB58 USB tester voltmeter ammeter TYPE-C fast charging detection
FNIRSI FNB58 is a professional USB Test Voltmeter for accurate measurement of voltage, current and power through USB connectors. This versatile device with 2.0-inch colour TFT LCD screen integrates USB- A, Micro- USB and TYPE- C interfaces to test various chargers, mobile devices and external batteries. USB Test Voltmeter is ideal for testing fast charging protocols, measuring load capacity and analysis of power consumption. This compact and reliable measuring device is essential for electronics enthusiasts, repairers and professional technology professionals.
USB Test Voltmeter - main features
- Universal TYPE- C, MicroUSB and USB- A interface - Test all the most popular telephone and device chargers on one device, regardless of their type or manufacturer. Ideal for families with various smart devices.
- Fast charging protocol detection - Automatically recognize PD, QC and other fast charging standards, showing accurate data about your charger's capabilities and real charging power.
- 2.0 inch color TFT LCD display with wide viewing angle - A large, refreshing and easy-to-read display shows all measurement data at one glance, even when viewed from the side or any corner.
- External 16-bit ACC production electronics - ensure the highest accuracy and reliability of measurement for professional use and scientific research.
- Capacity and energy consumption measurements - accurately measure the capacity of external batteries (0-9999.99 Ah) and energy consumption (0-9999.99 Wh) in seconds.
- Cable resistance measurement - Set the quality of the cable and its resistance (0-9999,9 Ω) to help identify broken or faulty cables.
- Long time for recording data - Automatic recording of measurements up to 99 days, 23 hours, 59 minutes and 59 seconds to analyse long-term energy consumption patterns.
Technical specifications
- Monitoring voltage: 4-28V
- Monitoring current: 0-7A
- Monitoring power: 0-140W
- Equivalent load internal resistance: 0-9999,9Ω
- D + / D voltage: 0-3,3V
- Capacity: 0-9999.99 Ah
- Energy: 0-9999,99 Wh
- Cable resistance: 0-9999,9Ω
- Operating time: 99d23h59min59s
- Registration time: 99d23h59min59s
- Temperature:
- Display: 2,0 inch colored TFT LCD
Who is it suitable for and how to use it?
USB Test Voltmeter is suitable for family, electronics repairers, IT specialists and technical enthusiasts. Use it to check the speed of your phone chargers, evaluate the quality of external batteries and diagnose broken cables. In practice: connect the test piece between the charger and the phone, and you will immediately see if your charger is given real power. USB Test Voltmeter helps save money that is not allowed to buy low-quality chargers.
Buyer questions
Q: Will this USB test voltmeter match all mobile phones?
Yes, the device has three universal connections (USB- A, Micro- USB, TYPE- C), so it is compatible with virtually all modern and older mobile phones, tablets and external batteries, regardless of manufacturers' brand.
Kl: How do I store the test and do I need supervision?
Keep in a dry environment away from moisture and temperature extreme. Clean the screen regularly with a soft tissue. The test machine does not have any modern parts and does not need to be inspected or replaced. Fault is rare because of sound electronics.
Kl: How long is delivery attracted and is there a guarantee?
The TopSmart store provides products with a standard warranty. Delivery to Lithuania usually attracts 5-14 working days depending on logistics. For more detailed information, see the booking status page.
USB Test Voltmeter is a necessary tool for anyone wishing to know the true quality of their chargers and batteries. Do not invest in low quality interfaces and fast charging devices without knowledge of their parameters - this test will provide you with all the necessary information.
Sources: USB Power Delivery protocols | TopSmart store
| Weight | 0.110 kg |
|---|---|
| Dimensions | 10 × 5 × 4 cm |
| Brand | FNIRSI |
| High- related chemical | None |
| DIY Supplies | Electrical |
| Origin | Mainland China |
| Voltage range | Other |
| Battery Included | No |
| Date Record | Yes |
| Dimensions | / |
| Operating Temperature | 0-50 |
| Accuracy Class | 1% |
| Display Type | Digital Only |
| Power Supply | AC |
| Certification | CE, FCC, RoHS, UL |
| Model Number | FNB58 |
| Power Source | AC |
| Monitor | 0- 7A |
| Monitor volume | 4-28V |
| Monitor power range | 0-140W |
| Load equivalent internal resistance | 0-9999.9Ω |
| D + / D-voltage | 0-3. 3V |
| Capability | 0- 9999. 99Ah |
| Energy used | 0- 9999. 99Wh |
| Cable resistance | 0-9999.9Ω |
| Equipmnt running time | 99days 23: 59: 59 |
| Record time | 99days 23: 59: 59 |
| Option | Yes |
| semi _ Choice | Yes |
14 review for FNIRSI FNB58 USB testuoklis voltmetras ampermetras TYPE-C greito įkrovimo detektavimas
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Х***Ч –
Excellent tester. And all ports work. Measure everything. Tsted different cables, chargers, phones.
Customer –
The eller is nice. I recommended it!
Shipped very quick.
The package relates in Kyiv via Ukrposhta.
And it also arrived as quickly as possible: it was supposed to arrive in the “corridor” between February 2-7, 2026.
And it appeared on February 2, 2026.
The box was very nicely and caeably picked.
It covered complete UNDAMAGED, as if I had bought it in a thickness! The box was with the film maker.
The USB tester is of good quality, original!
I ordered the Bluetooth version:
Fnirsi FNB58 + Bluetooth.
And that’s exactly what I received.
It differs from the version WITHOUT Bluetooth in color: blue-gray. And the BlueTooth icon on the “label” that goes on the “back” of the tester. There is neither the word “BlueTooth” nor the corresponding icon on the front side of the tester. And on the yellow “cloak” it is simply written:
FNB58
But don’t be afraid — this is the Bluetooth version. Moreover, the version WITHOUT Bluetooth also differs in COLOR: it is BLACK. And this one is blue-gray.
Satisfied with the patch.
The quality of the test is very good!
Thank you to the Seller for the great product!
And to you, for your appointment!
Customer –
An extended tester. It allows you to check many chargers and cables. It is likely to read the instructions before use. This results full functionality. For some reason, I have a problem where the tester cannot identify the chip in a 100W cable.
Customer –
It works. Had a bit of trouble with the connection, but everything’s fine now.
Customer –
Works. Good tester. Up to 28V.
Customer –
Advanced USB tester, made of durable material.
Good display visibility and exclusive scope and PD management functions. A bit completed to continue at first, but you get used to it.
Customer –
Userful tool for evaluating chargers and USB cables
Customer –
It works effectively and provides a lot of data on the charging speed and battery capacity.
Customer –
Fnirsi is on top of its game as always. Works successfully, the firmware is new out of the box, version 1.11.
R * * 1 –
All ok. it’s a perfect product! thank you.
Customer –
The box arrived in a clean condition without any damage. When I slid the box open, there were two certificates of conformity included with the main unit for some reason. There was no instruction manual. I used it a few times, and everything seemed to work normally, including the buttons. However, even when I turned the G-sensor off, it was not saved, and when I restarted it, it was back on. The firmware was (V1.11). I think it’s a good product. It’s fun to use, thank you.
Customer –
Good packaging, fast delivery, my husband is very saturated. works well, P / O updated to the latest version.
Thank you very much to the thickness, I recommend it.
Customer –
Corresponds to the description, aluminum body, I recommend it.
Customer –
Product as described, well packaged, fast delivery.