FNIRSI FNB48P is a professional USB tester voltmeter for accurate measurement of electrical parameters. This compact device with CNC metal parts allows you to control the voltage, current and loading capacity. USB Tester Voltmeter is an ideal tool for engineers, technology and electronics enthusiasts who want to check the quality of chargers and USB cables.
USB Tester Voltmeter is ideal for electronics professionals, electricians and hobbies who often test USB chargers, cables and mobile batteries. Use very simple: connect the device to the charger and the device, and it will start to display real values immediately. This measure is particularly useful for testing high-speed charging systems, for detecting broken cables and for controlling energy savings.
Kl: Can USB tester volmeter measure all types of chargers?
Yes, it is compatible with standard USB TYPE- C chargers and TYPE- C cables. Matches many loading protocols, including QC 2.0, QC 3.0 and FCP standards, but works best with modern devices.
Q: Is this device safe for long-term use?
Absolutely. The FNIRSI FNB48P has internal protection circuits that prevent short-circuit and overflow. The CNC metal body also provides additional protection against calamity and mechanical damage.
Q: What is the delivery time and is there a warranty?
Usually delivery to Lithuania takes 7-14 days through our logistics partners. The product has a manufacturer's guarantee and the TopSmart store provides additional protection and refund guarantee.
FNIRSI FNB48P USB Tester Voltmeter is a non-erased device for anyone who is important to know the quality and safety of their electronics. If you want to buy a reliable counter, this model is a great choice.
Sources: USB Standard Information | TopSmart store


























| Weight | 0.500 kg |
|---|---|
| Dimensions | 17 × 11 × 7 cm |
| Brand | FNIRSI |
| High- related chemical | None |
| DIY Supplies | Electrical |
| Origin | Mainland China |
| Voltage range | Other |
| Battery Included | No |
| Operating Temperature | -10C ~ + 80 |
| Accuracy Class | 0.1% |
| Display Type | Digital Only |
| Power Supply | DC |
| Certification | THIS |
| Model Number | FNB48P |
| Monitor volume | 4-24V |
| Monitor | 0-6.5A, 0-156W |
| 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 |
M * * –
The movement does not need adaptation, everyone is fine.
A * * * j –
Fnirsi is as usually on top. Product quality is extended, current specifications, easy to use. I recommended
Just please note that a new version with an additional national program has appeared.
U * * * –
Very fast delivery to Ukraine, Kyiv – 14 days. Great! Good packaging.
Well done by the FNIRSI. And FNB48P is one of the best tests in terms of price / performance ratio among such classes of instruments in market.
O***o –
a well-known test from a family company, performances its function, no instructions but everyone is great.
U * * * –
For the European Parliament Fnirsi as immediate effect quality.
M***l –
Looks nice, I recommend it
Customer –
Quality product, good presentation and impeccable. Precision, very comfortable and easy to handle. It doesn’t have a battery.
j –
Product identical to the one published by the seller. It applies to be of good quality in terms of materials and finishes. It works correctly. It appeared before the promoted deadline. I would buy from this story again and recommend this seller.
Customer –
Everything is fine.
R * * –
Works as described. Great usb tester.
Please create a bluetooth app for iphones.
Customer –
A good toy, it detects all actual protocols, measures voltage fluctuations, you can check the cable as well as the charging and battery capacity…
Customer –
So many features to control usb power delay, awesome!
Customer –
Everything is great, the quality is perfect.
Customer –
Product exactly as promised and works great. shipping didn’t take long and it is a nice, sturdy build.
Customer –
The Parcel managed without age. The item works fine.
It’s my first time purchasing from fnirsi and i’m really satisfied.
Customer –
Really like this test.worth every penny.
Customer –
Advanced product that performances its function with high efficiency.
Customer –
finally a USB device that sets and calculates electronic data.
Use for testing power supplies, chargers, and power banks as well as provide absorption.