# Fnirsi FNB58 BT USB Port Tester with Bluetooth Connectivity

**URL:** https://aio.lv/en/product--fnirsi-fnb58-bt--12426866
**Data updated:** 2026-05-10 04:43 (EEST)
**Category:** Electronics Accessories
**Manufacturer:** Fnirsi
**Manufacturer code:** FNB58 BT
**EAN:** 5905156102194
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 52.49 €
**Prices and availability valid until:** 2026-07-20 23:59
**Price without VAT (21%):** 43.38 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fnirsi-fnb58-bt--12426866

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.89 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

The Fnirsi FNB58 BT is a professional-grade USB port tester designed for monitoring and analyzing voltage, current, and power delivery protocols. Featuring integrated Bluetooth connectivity, it allows for wireless data transmission and real-time monitoring via compatible devices. This tool is essential for testing chargers, cables, and power banks, ensuring accurate diagnostics of charging performance and protocol compatibility in various electronic applications.

## Long description

The Fnirsi FNB58 BT is a professional-grade USB port tester designed for monitoring and analyzing voltage, current, and power delivery protocols. Featuring integrated Bluetooth connectivity, it allows for wireless data transmission and real-time monitoring via compatible devices. This tool is essential for testing chargers, cables, and power banks, ensuring accurate diagnostics of charging performance and protocol compatibility in various electronic applications.
Advantages
This device offers exceptional measurement precision with a resolution of up to 0.0001, allowing users to detect even the smallest fluctuations in power parameters. Its robust construction includes high-quality 24-pin copper contacts in the Type-C port, ensuring stable and reliable connections during intensive testing. The tester provides comprehensive support for a wide range of fast charging protocols, making it a versatile tool for diagnosing modern electronics. With the ability to record data offline for up to 9 hours and perform real-time waveform analysis, it provides deep insights into charging behavior and charger quality.
Suitable for
Testing the performance and quality of USB chargers and power adapters
Verifying the actual power delivery capabilities of USB cables
Analyzing fast charging protocol compatibility for smartphones and laptops
Diagnosing battery health and calculating capacity
Monitoring power stability and ripple to prevent equipment damage
When it may not be suitable
This device is primarily intended for technical diagnostics and may be overly complex for casual users who only need to check if a device is charging. Additionally, the Bluetooth mobile application features, including specific alarm functions, are not supported on iOS devices, which may limit functionality for some users.
Key specifications
Display: 2.0-inch high-resolution LCD
Measurement resolution: 0.0001
Supported protocols: PD 2.0, 3.0, 3.1 (EPR AVS up to 28V), PPS, QC 2.0/3.0, FCP, SCP, AFC, PE, DASHVOOC, SuperVOOC
Connectivity: Bluetooth for wireless monitoring and PC interface
Ports: USB-A (5P high current), USB-C (input/output), Micro USB (input)
Offline recording: Up to 9 hours
Dimensions: 42 x 13 x 82 mm
How to use
To begin testing, connect the Fnirsi FNB58 BT between your power source and the device being charged using the appropriate USB-A, USB-C, or Micro USB ports. The device will immediately display real-time voltage, current, and power data on the LCD screen. Use the integrated function buttons to navigate the menu, switch between display modes, or trigger specific protocol tests. For advanced analysis, connect the device to a computer via the PC interface or pair it with a compatible Android device via Bluetooth to monitor waveforms and record data logs.
What to consider before purchase
Verify that your primary mobile device is compatible with the Bluetooth app if you intend to use wireless monitoring.
Ensure the device supports the specific charging protocols used by your hardware.
Consider whether you require the advanced offline recording features for long-term diagnostics.
Usage recommendations
For the most accurate results when testing cable resistance, use the two-step constant current load method provided in the device menu. Always ensure the firmware is updated to the latest version to maintain compatibility with the newest fast charging standards.

## FAQ

### How much does the Fnirsi FNB58 BT USB Port Tester with Bluetooth cost, and is it available for purchase?

The price is 52.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 115 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Fnirsi products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Fnirsi service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12426866/68724886_large.webp