Product Introduction
The FNIRSI DSO-TC4 and DSO-TC3 represent a significant leap in portable electronic testing, integrating three essential tools into a single, compact handheld device: a digital oscilloscope, a versatile transistor tester, and a DDS signal generator. This innovative 3-in-1 solution addresses the common challenge faced by electronics enthusiasts, hobbyists, and professional technicians who require multiple instruments for debugging, repair, and development but are constrained by space, budget, or the need for on-the-go diagnostics. By combining these functionalities, FNIRSI offers an unparalleled level of convenience and efficiency, making complex electronic analysis accessible and portable. These devices are uniquely positioned to streamline workflows for projects ranging from basic circuit troubleshooting to advanced component characterization and signal simulation, providing a comprehensive toolkit for modern electronics work. Check out our other technical reviews for more hardware testing.
Hardware specifications
Core Specifications: FNIRSI DSO-TC4 DSO-TC3
Available Versions
Available Versions & Selection Guide
The FNIRSI DSO-TC series is available in several configurations to suit different user needs and budgets:
* DSO-TC3 Standard: The base model offering core 3-in-1 functionality.
* DSO-TC3 Option: An enhanced version of the TC3, likely including additional accessories.
* DSO-TC4 Option: The most advanced model, featuring higher performance specifications and a broader range of features.
Package Contents
What’s in the Box?
The package contents vary depending on the chosen model and option:
* DSO-TC4:
* DSO-TC4 unit ×1
* P6100 high voltage probe ×1
* Alligator clip probe ×1
* Test hook ×3
* Adapter ×1
* Type-C charging cable ×1
* Packing box ×1
* Manual ×1
* DSO-TC3 (Standard):
* DSO-TC3 unit ×1
* Ordinary probe ×1
* Test hook ×3
* Type-C charging cable ×1
* Packing box ×1
* Manual ×1
* DSO-TC3 (Option):
* DSO-TC3 unit ×1
* P6100 High Voltage Probe ×1
* Ordinary probe ×1
* Test hook ×3
* Adapter ×1
* Type-C charging cable ×1
* Packing box ×1
* Manual ×1
Features and benefits
Why I love FNIRSI DSO-TC4 DSO-TC3
Pros and Cons
Strengths & Weaknesses:
What I Like
Points to Consider
Price and Availability
Where to Buy & Customer Reviews
Check Price on AliExpress (Best Value)
Find on eBay (New & Used)
As an Amazon Associate, eBay Partner, and AliExpress affiliate, I may receive compensation if you make a purchase through the links on this page at no extra cost to you. This supports my technical reviews and independent hardware testing.
Store info
STORE
⭐ 98.6% Positive Feedback | 123.0K Followers
| Name: | FNIRSI Official Store |
| Store no.: | 2939001 |
| Location: | China |
| Open since: | Feb 26, 2017 |
Detailed seller ratings
| Item as Described | 4.9 Above Average |
| Communication | 4.9 Above Average |
| Shipping Speed | 4.9 Above Average |
OTHER GOODS
User reviews
User Reviews & Feedback Analysis ⭐ 4.9 (208) | Sold (1,000+)
Reviews FNIRSI DSO-TC4 DSO-TC3
Authentic Feedback Analysis:
⭐ 5.0/5 | L***A: Small instrument with various useful functions, arrived very quickly and well packed. The instrument comes with various probes and works decently. Among the functions, besides the transistor tester, there is an oscilloscope that goes up to about 11MHz. Voltmeter and resistance measurement function. The instrument is not able to display if a diode is a Zener type, it only offers the parameters. In context, it is very nice but lacks a manual with more languages. Ps: as soon as I have time I will upload the images.
⭐ 1.0/5 | AliExpress Shopper: 1 month late on delivery. And battery H.S. The battery seems to work with a more powerful charger, even though the first recharge until the «green» indicator did not work. To be seen over time.
⭐ 5.0/5 | U***r: amazing device. any electronic hobbyist needs this device now!
⭐ 5.0/5 | d***d: arrived as pictured. arrived in a week, serious seller. only one problem, explanations are in Chinese and English.
⭐ 5.0/5 | AliExpress Shopper: awesome!
⭐ 5.0/5 | d***d: best for many
⭐ 5.0/5 | AliExpress Shopper: good material
⭐ 5.0/5 | w***a: Good equipment
⭐ 5.0/5 | a***r: Arrived well packed, all ok. I thank the seller and recommend. Great purchase.
⭐ 5.0/5 | AliExpress Shopper: Arrived very fast, great product, great service!
⭐ 5.0/5 | E***s: everything arrived correctly as advertised, very well packaged. congratulations to the sellers.
⭐ 5.0/5 | AliExpress Shopper: everything arrived correctly, I really liked the purchase. excellent product, I recommend it.
⭐ 5.0/5 | j***r: I bought it for a friend, it worked perfectly, he loved it.
⭐ 4.0/5 | a***n: Leaves doubts with the components, it was not like in the promotional video, it did not identify the transistors, I find it more reliable to check with a multimeter.
⭐ 5.0/5 | J***o: it took too long… but it arrived in good condition, very good packaging.
⭐ 5.0/5 | A***a: excuse my camera, but the package arrived in good condition, everything is fine friends, it is reliable.
⭐ 5.0/5 | O***t: Bought DSC-TC4. Received with technical problem. Then the seller sent another one where there are no problems. I recommend this seller. Honest seller who helps if there are problems. Happy with working device. I have bought 4 Fnirsi devices and am happy with them. And fast shipping.👍👍
⭐ 5.0/5 | a***r: The product is original. It’s wonderful.
⭐ 5.0/5 | m***a: The product arrived quite fast considering it was sent to ARGENTINA and it takes a long time here. The DSO TC4 is great, however I haven’t used all its functions. I need to get to know it a bit more.
⭐ 5.0/5 | AliExpress Shopper: Fast delivery from Brazil before the deadline. device tested and all ok. it will be very useful. I recommend it!
⭐ 5.0/5 | R***S: fast delivery testing and I’m loving everything as ordered, congratulations Aliexpress
⭐ 5.0/5 | S***u: Delivered on time, very good equipment!
⭐ 5.0/5 | M***r: it’s great and very practical because it brings many useful functions
⭐ 5.0/5 | AliExpress Shopper: this device is really cool, very functional
⭐ 5.0/5 | R***a: Excellent
⭐ 5.0/5 | X***s: Excellent quality finish that FNIRSI has accustomed us to, very adjusted prices, good delivery time to Spain. I recommend product and seller.
⭐ 5.0/5 | J***a: Excellent tool. I haven’t started using it yet but it’s exactly as advertised.
⭐ 5.0/5 | R***n: Excellent product thank you very much, Excellent product, thank you very much.
⭐ 5.0/5 | AliExpress Shopper: excellent product….
⭐ 5.0/5 | j***r: Fits the description great
⭐ 5.0/5 | r***a: great tool. I will continue to use it.
⭐ 5.0/5 | U***r: Good
⭐ 5.0/5 | M***i: Good item, as described
⭐ 5.0/5 | AliExpress Shopper: Great stuff. Ordered on 12/AUG/25, received on 1/SEP/25 in Latvia. Not tested yet.
⭐ 5.0/5 | M***i: Good devices and fast delivery
⭐ 5.0/5 | G***s: Have not tested yet but hope to soon. Delivery was very quick, was estimated to arrive by 2nd of Jan but was received before 25th Dec. Packaging was very good also, meaning there was no damage or dents to the box.
⭐ 5.0/5 | W***i: I did not receive it because the logistic company lost it. the seller contacted me and supported in the refund process. Very serious seller. Would buy other instrument with them again.
⭐ 4.0/5 | AliExpress Shopper: I have received the item and it ok
⭐ 5.0/5 | j***t: I ordered the DSO-TC4 with options. comes with probes and among others an MCX to BNC adapter. (necessary for the included probe). This adapter needs a bit of extra pressure to insert into the DSO, DDS and IN signal interfaces. I would suggest to use MCX to BNC or SMA on a flexible cable. So far I tested the unit as oscilloscope, signal generator and voltage tester. All good function. Not tested yet Zener Diode, DS18B20, DHT11, IR decoding and USB sharing. The manual is well done in English. I do not see which Windows computer program would be useful with the USB sharing. There is a description on how to manage a future firmware upgrading. My version is V0.0.7. This is partly clear, but how to find this firmware. Did not further investigate on the website. www.fnirsi.cn I am satisfied. Unit is very useful for my amateur usage. good price / value. Quick delivery from Neuss in Germany.
⭐ 5.0/5 | AliExpress Shopper: I received as described, it is well packed, came without any damage, still not tested, hope function will be as advertised
⭐ 5.0/5 | AliExpress Shopper: I’m happy about the product, very portable and can be easily carried anywhere
⭐ 5.0/5 | k***v: I’m very satisfied
⭐ 5.0/5 | A***a: arrived before the estimated date, I’m testing it and it looks very interesting, the seller informs about the progress of the order if requested, but I made a second order and I don’t understand why this time I’ve been waiting more than a week and they don’t solve it for me.
⭐ 5.0/5 | A***a: arrived in good condition, when testing it had no errors. quite satisfactory when using it, it is somewhat small but fulfills its purpose quite well.
⭐ 5.0/5 | L***s: wonderful.
⭐ 5.0/5 | S***i: merchandise well received. am very happy now i have a total of three fnirsi device in my toolbox. definitely am looking forward for what I might need and buy again from you.. thanks a lot for great tools
⭐ 5.0/5 | G***v: Much appreciated
⭐ 5.0/5 | r***r: very good arrived on time
⭐ 5.0/5 | W***e: Very good, arrived fast and in perfect condition. Great seller.
⭐ 5.0/5 | g***a: very good…
⭐ 5.0/5 | S***y: Very good equipment. Super fast delivery. Excellent seller
⭐ 5.0/5 | AliExpress Shopper: very good product, really.
⭐ 5.0/5 | AliExpress Shopper: Very happy
⭐ 5.0/5 | AliExpress Shopper: Very happy
⭐ 5.0/5 | N***a: very satisfied, very good product, it fulfills its purpose
⭐ 5.0/5 | D***r: Nice transaction fast delivery
⭐ 5.0/5 | R***g: now this is small! A full scope within Your hand. One downsize: The probe cable is not very flexible. in combination with the lightweight scope, this might cause issues.
⭐ 5.0/5 | P***r: ok
⭐ 5.0/5 | m***r: OK all good thanks.
⭐ 5.0/5 | B***r: great product arrived perfectly working well packed and very fast arrived on time still not tested
⭐ 5.0/5 | AliExpress Shopper: Great, as described, arrived super fast and well packed.
⭐ 5.0/5 | h***r: Excellent product. Conforms to descriptions.
⭐ 4.0/5 | E***e: Nice and easy to use measuring tool.
⭐ 5.0/5 | AliExpress Shopper: package somewhat battered, but product undamaged. arrived a month earlier than estimated 👌
⭐ 5.0/5 | J***z: Perfect, unbeatable quality-price. Great help electronic tool, very useful in component verification. Very well packed.
⭐ 5.0/5 | J***J: First time buying and it came very fast within the deadline, everything came complete without any damage and working perfectly, really very good product, you can trust 👏🏻👏🏻👏🏻
⭐ 5.0/5 | B***o: Product as offered, satisfied with the product with all its tools.
⭐ 5.0/5 | L***k: Very good quality product
⭐ 5.0/5 | AliExpress Shopper: Excellent quality product! seller 10/10. Super Recommended.
⭐ 5.0/5 | J***E: Excellent product, I recommend it
⭐ 5.0/5 | AliExpress Shopper: product very well packed, all as advertised!
⭐ 5.0/5 | D***U: QUICK DELIVERY IN TANZANIA AND TESTED FOUND WORKING PROPERLY I like this store ❤️,GOOD STORE
⭐ 5.0/5 | H***i: Received within the deadline. Product of excellent quality.
⭐ 5.0/5 | F***e: I received the order in Brazil in ten days. Well packed, but I thought there was a lack of accommodation between the manufacturer’s box and the shipping box. Equipment already tested and working correctly. Smaller size than expected but a good product. I am extremely satisfied.
⭐ 4.0/5 | U***i: looks very good quality, I haven’t tested it completely yet, but in principle it works very well
⭐ 5.0/5 | S***U: Super
⭐ 5.0/5 | AliExpress Shopper: Super tool for electronic work
⭐ 5.0/5 | G***r: Super instrument for electronic work, good value for money. I still need to make or get an adapter for SMD components.
⭐ 4.0/5 | AliExpress Shopper: The device has packed with lots of features and functions and good for its price tag. I took personally the limitation of the inductance measuring range. However, I suggest to make the vertical and horizontal controls of the oscilloscope and the frequency and amplitude controls of the signal generator more intuitive or put separate buttons dedicated for these functions.
⭐ 5.0/5 | A***n: The shipping was fast, the packaging protection is excellent, the oscilloscope box had no dents or scratches, its of good quality and all functions are in perfect condition, —100% recommended.
⭐ 5.0/5 | a***r: This is perfect for fixing electronic things for me. FNIRSI makes great test gear. Very professional. I now have 3 of their testing units.. Thanks.
⭐ 4.0/5 | l***o: ALL VERY WELL EXCEPT FOR AN IMPORTANT DETAIL I DID NOT RECEIVE ALL THE ACCESSORIES INCLUDED IN THE PURCHASE, THE OSCILLOSCOPE PROBE TIP AND THE ADAPTER THAT COMES TO CONNECT TO THE OSCILLOSCOPE ARE MISSING, EVERYTHING ELSE IS PERFECT, I WOULD APPRECIATE INFORMATION ABOUT IT AND IF IT IS POSSIBLE THAT THEY SEND ME WHAT IS MISSING SINCE I HAVE VERY GOOD REFERENCES FROM THE SELLER.
⭐ 5.0/5 | j***r: all good thanks.
⭐ 5.0/5 | C***A: an excellent equipment, an excellent equipment, very good quality
⭐ 5.0/5 | p***a: Serious seller, product received intact, corresponds to the description. I recommend this seller.
⭐ 1.0/5 | AliExpress Shopper: Very bad quality, the worst service after sale and very bad customer service, so you don’t buy from this seller and please not buy in AliExpress, because if you received the item damaged, defect or not working, you can’t return it! 😠 For me I am done with AliExpress, I go to start to buy in Temu! 🙄
⭐ 5.0/5 | M***s: very good
⭐ 5.0/5 | Z***S: very good 👍
⭐ 5.0/5 | AliExpress Shopper: what a great device, extensively tested and works perfectly, I can recommend it to everyone
⭐ 4.0/5 | AliExpress Shopper: working with no issues, the PWM signal looks like a little bit off but only happens when the battery is low
⭐ 5.0/5 | M***v: Ok
⭐ 5.0/5 | O***o: Received. Looks very nice. Works great. There are different languages to choose from. Ordered on 29.06, delivered on 8.07, super fast delivery.
⭐ 5.0/5 | R***k: super
⭐ 5.0/5 | A***v: Excellent quality product, I recommend buying it👍
⭐ 5.0/5 | d***r: The product arrived in Ukraine earlier than planned, the packaging is very good, everything is according to the description, I recommend the seller. Unfortunately, the oscilloscope probe is not complete, there is no way to check it.
⭐ 5.0/5 | Б***ч: good device
⭐ 5.0/5 | y***r: The oscilloscope function and signal generator function worked as expected. The waveform was generally accurate.
⭐ 5.0/5 | AliExpress Shopper: High quality and satisfied. Received the latest version.
⭐ 5.0/5 | س***ي: Excellent and practical and worth buying and accurate I loved it and did not regret buying it Thank you FNRSI
