2C53T Upgraded Handheld Oscilloscope, 50MHz Bandwidth, 3IN1 Digital Oscilloscope Multimeter DDS Generator, 250MS/s Sampling Rate, 19999 Counts, Voltage, Current, Capacitor, Resistor, Diode Test

Best value and quality for a travel version!!! Thank you created a loyal customer bow I want more of your products!!! Thank you again!!!

Nice handheld scope. Had it for a few weeks and it seems very functional. Compared some traces with a 4 ch LeCrow and it was very comparable (digital CMOS logic gates). It's a small screen for sure, and the grid lines are a little hard to see even at the highest brightness. The function generator is a bit limited - seems to go up to 50kHz. Another cheap handheld scope I had (and lost) went to 1M. There a multimeter mode as well that looks functional. It plugs into a PC but I think it's to transfer over screen shots - I don't see any SW on their web site to control it remotely over USB. A good deal for sure. A nice case, some ok probes, and some misc cables to use with the DMM are included. I checked them and they all worked in my copy

This works pretty close to its claims and is undoubtedly a good value. The bandwidth claim is more honest than many others out there, that's for sure. And I have tested many. My test equipment only goes up to 40 MHz but handled up to a 40 MHz sine wave without any amplitude degradation. That's the good news. The bad news is that the amplitude INCREASED with the frequency both as the displayed waveform and the calculated value displayed. A 10 Vp-p 100 kHz sine wave showed as 10.25 Vp-p. This kept increasing with frequency until it showed 11.9 Vp-p for a 10 Vp-p sine wave. But there was one highly annoying behavior. When you press AUTO, it automatically sets volts/division and the timebase but sometimes gets confused. Such as if I suddenly gave it a 30 MHz square wave. It continues to display "Awaiting Auto Measurement." I pressed every button to try and get out of it. Even the POWER button would not work. I disconnected the signal, and it continued to be "locked up." After another minute, it magically cleared itself. Total time was over two minutes. I saw this several times. An annoyance like this is really enough to give zero stars and reject the item outright. But its price is so low and so much of it works reasonably well that it is still worth considering. But the manufacturer REALLY should not have a design can lock up the system leaving you helpless. If this happens to you much, you will probably give up on "AUTO" and make those settings manually. I also focused on AC voltage measurement. The manufacturer does not state the AC frequency response in advertising, and not even in their manual. (It is an important spec and should at least be in the manual.). A query to them produced an answer that is about 450 Hz. So, it is minimal, but that is common for most inexpensive meters. In testing, it was excellent for a sine wave up to 1.5 kHz. The manufacturer also said it was not "True RMS." This usually means a square wave reading will be 11% too high. But a 400 Hz 10 Vp-p square wave read 9.732 Vac (10.000 would be perfect). The device may be trying to figure out something about the AC wave shape after all.

Great features for the price, built rechargeable battery is a plus

I like this. It's practical and easy to figure out and use. I purchased it because I use the Oscilloscope and Signal Generator. A great price too. A few years back something like this would have cost a fortune. It's Professional quality and comes with the both signal and test probes. It does a lot more. Im still learning more about it.

Product seems to be well made and comes with a nice case. display is bright and good resolution. The unit I received was missing the necessary multimeter probes, apparently left out in assembling this unit. The instruction manual, as expected, leaves much to be desired and for the most part written in Chinese but understandable enough. appears to be a good buy for the money. Missing probes probably a one-off mistake. An old set of probes I had seem to work. I will check with Amazon about the missing probes.

Great. Works fantastic. I love this multimeter.

* Firnsi scope meter (Nov 2025) * I give this meter 1 star so others might read this review and not be disappointed. Meter was purchased in April 2025, so some bugs may have been fixed since then. The latest bug encouraged my writing of this review. * Scope is misleading * I was debugging my latest project and expected approximately 1200 Hz square wave. Firnsi meter displayed one cycle over 20ms, or 50 Hz (photo 1). When time base adjusted to 500us, the expected 1.66 cell width for 1200 Hz was displayed (photo 2). A cheaper meter/scope produced the expected cluttered display when on the 20ms setting (photo 3). Cheaper meter also gave the expected 1.66 cell cycle width at 500us (photo 4). Note 1 - photo 2 includes ghost traces not notice when photo taken (but perhaps due to persistence setting of 500ms). Note 2 - project had glitch in supply and glitch shows in some of the waveforms (and reason I was using scope). * Meter also has glitch * Firnsi meter will sometimes read AC voltage off by a factor of approximately x10. This bug occurs about 2% of the time, and appears related to the auto ranging (which can not be turned off). See photo showing 1.8v reading instead of 19v applied. Video also demonstrates this bug. * Display hard to read outside * I planned to use the meter outside. However, the scope grid lines are impossible to read outdoors. Overall, the display is very difficult to read outside (even in shade, including the meter functions), and impossible to read in direct sunlight. * No plans to use meter * This meter has been place in my do not use pile and replaced by a $40 alternative. If I need a two channel scope, I will drag out my bench unit.

水晶振動子の動作確認用に使いましたが正確に発信周波数をとらえています。

Try this it's good Getting femiler with the product

Nice product 👌

Recently purchased, good, complex device, need more time. Thanks 👍

I have used the FNIRSI 2C53T for about few months. It is a small unit with multimeter,function generator and oscilloscope. This makes work easy on a bench. The auto mode is helpful, but I often choose the function myself (volts, ohms, diode, etc.). The oscilloscope is good for my needs. 50 MHz is enough for hobby and school/college work. The menu felt new at first, but after a quick read of the guide and a couple short videos, it was easy to use. The Auto key finds a signal fast. I still like to set the trigger by hand and change time/volts per division, so I can see the wave clearly. The screen is bright indoors. USB-C charging is simple. Battery life is fine for a day of light tests. The probes are OK for the price. For quick checks and projects, this tool saves time and space. I am happy with it and plan to keep using it.