# USB tester FNIRSI FNAC-28 precise current voltage measurement

**URL:** https://aio.lv/en/product--fnirsi-fnac-28--11618319
**Data updated:** 2026-02-09 14:25 (EET)
**Category:** Measuring tools
**Manufacturer:** Fnirsi
**Manufacturer code:** FNAC-28
**EAN:** 5907085527208
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.49 €
**Prices and availability valid until:** 2026-08-06 23:59
**Price without VAT (21%):** 16.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fnirsi-fnac-28--11618319

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 22.07.2026 | free |
| Pickup points | 27.07.2026 | 1.89 EUR |
| Courier delivery to door | 27.07.2026 | 4.99 EUR |

## Summary description

The FNIRSI FNAC-28 USB tester measures voltage and wattage with support for USB Type-A and Type-C connectors. It features USB 3.2 Gen 2 compatibility and compact dimensions of 73mm x 36mm x 12mm, making it ideal for precise measurements in various applications.

## Long description

The FNIRSI FNAC-28 USB tester measures bidirectional current, voltage and power for devices using USB-A and USB-C interfaces. Equipped with a 16-bit ADC, the tester provides high-precision readings and supports USB 3.2 Gen 2 compatibility. It reports battery capacity, displays curve graphs, recognizes fast-charging protocols such as QC2.0/QC3.0 and VOOC, and can measure cable internal resistance and simulate different charging standards for accurate data analysis.
Advantages
The device delivers precise voltage, current and wattage measurements thanks to a 16-bit ADC and supports both USB-A and USB-C connections. Compact dimensions make it portable for field and bench use. It recognizes multiple fast-charging protocols and provides battery capacity reporting and curve graphs for detailed analysis, while the ability to measure cable internal resistance and to simulate charging standards increases testing flexibility.
Suitable for
Testing and verifying USB chargers and power banks
Measuring device charging profiles and battery capacity
Diagnosing cable quality by measuring internal resistance
Laboratory and bench testing of USB power delivery and fast-charge protocols
Key specifications
Interfaces: USB-A and USB-C
ADC resolution: 16-bit
Bidirectional current measurement up to 6.5 A
Supports USB 3.2 Gen 2 compatibility
Fast-charging protocol support: QC2.0, QC3.0, VOOC
Functions: battery capacity reporting, curve graph display, cable internal resistance measurement, charging-standard simulation
Dimensions: 73 mm x 36 mm x 12 mm
How to use
Connect the FNIRSI FNAC-28 between the power source and the device under test using the appropriate USB-A or USB-C connector. Read voltage, current and power values on the display; use the curve graph function to observe charging behavior over time. Use the internal-resistance measurement and charging-standard simulation functions when diagnosing cables or testing compatibility with fast-charging protocols.
Usage recommendations
For stable and accurate measurements, ensure secure connector seating and avoid subjecting the tester to mechanical stress or moisture. When testing fast-charging protocols, follow device and charger manufacturer guidelines and do not exceed the tester's maximum current rating.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.021 kg |
| Height | 12 mm |
| Width | 73 mm |
| Depth | 36 mm |
| Product colour | Black, Silver |
| USB version | 3.2 Gen 2 (3.1 Gen 2) |
| Built-in display | Yes |
| Power connectors supported | USB Type-A, USB Type-C |
| Testing type | Voltage, Wattage |

## FAQ

### How much does the USB tester FNIRSI FNAC-28 cost, and is it available for purchase?

The price is 19.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 262 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 22.07.2026 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/11618319/66826056_large.webp