Scott G.
No support and poor quality.
I was gifted a soldering iron and it worked 2 times and is now dead. They have zero support. Typical Chinese junk, typical Chinese product support.

Discover innovative test equipment at FNIRSI, including digital oscilloscopes, multimeters, signal generators, soldering tools, and USB testers—ideal for pros and hobbyists alike.
Fnirsi (fnirsi.com) has 54 customer reviews on Five Star Index, with an average rating of 1.7 out of 5.
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Showing 43 reviews with 1 star · Clear filters
Scott G.
I was gifted a soldering iron and it worked 2 times and is now dead. They have zero support. Typical Chinese junk, typical Chinese product support.
Herr S.
Avoid buying there. Warranty is non-existing. They are sending you instructions how to solve it yourself for 5 weeks and not replying to the real request to exchange or repair the power supply I purchased. If you pay cheap, you will pay twice. Typical Chinese cheap company without any quality. AVOID BUYING THERE
Francis R.
I purchased an oscilloscope tablet. After one year, the battery does not longer charge hence unusable. I wrote the company, never received any feedback.
MS
Unfortunately Fnirsi is happy to disregard any warranty issues and I have purchased 3 different items from them. Most recently a Multimeter with a failed internal relay which was a known problem, they suggested that I change it myself even though the meter was purchased less than 12 months ago. Very disappointing and will not purchase another Fnirsi product due to this.
Robert S.
Service versucht mit 1000 Rückfragen den Fall zu verzögern. Mehrere Male eine Rückgabe beantragt, keine vernüftige Antwort. Produkt hat nicht so funktioneirt wie gewünscht.
Defrank
Non spediscono e non rispondono alle sollecitazioni. Meglio comprare dai siti conosciuti. Tanto sforzo per le presentazioni,ma la chat,le garanzie ,insomma TUTTI i contatti sono ignoranti,pessimo e sconsigliato.Avro difficoltà a recuperare i soldi ,due mesi fa pagati.
Dennis F.
The product itself feels high-quality at first, but when opening the lid, the tip of the soldering iron shaft literally fell right out (manufacturing defect, poorly crimped). Although I reported this with photos just 5 minutes after delivery, customer service immediately accused me of having used it. That was not the case, and even if it were, a soldering tip shouldn't just fall off, right? Anyway, it took 10 emails with a 1-2 day response time each just for a €15 tip! This feels like a tactic and is unacceptable. This was my last time buying from Fnirsi if this is how they treat customers.
Zonk R.
I used to love FNIRSI hardware (owning the DPSO350, multiple USB testers, radiation detectors, and the HS-03 iron). The hardware is decent, but their customer support is catastrophic. If your package gets lost, they will ghost you and keep your money. Ordered the SWM-20 on April 1st, 2026. It never arrived. On April 15th, FNIRSI even sent me an email confirming a "delivery exception" due to "unusual shipping conditions." Yet, they marked the order as "delivered" in PayPal using a fake carrier named "MANUAL". For over THREE MONTHS, I was trapped in a loop of automated AI text templates ("the store manager is handling it", "please be patient"). I gave them a final 96-hour ultimatum, escalated directly to their Executive Office management (Toby). Result? Just another useless bot reply saying "this issue will eventually be resolved." The grand finale: I finally escalated the case to PayPal. PayPal checked the invalid tracking data provided by FNIRSI and closed the case in my favor WITHIN SECONDS, issuing an immediate refund. Buyer beware: FNIRSI has zero respect for long-time customers and zero business ethics. If something goes wrong with logistics, you are completely on your own. Avoid buying directly!