I spent some time testing the FNIRSI 2D15P on a few electronics projects, and it quickly became clear this little device packs a lot into one tool. It combines an oscilloscope, multimeter, and signal generator in a single unit, which saved me from digging through a toolbox full of separate devices.
The 4.3-inch touchscreen made it easy to switch between modes without fumbling through menus. I found the multimeter function simple to use for checking voltage, current, and resistance, and the oscilloscope gave me clean waveform readings for basic signal checks. The built-in battery also meant I could use it away from an outlet, which came in handy when testing wiring in a car.
That said, this tool is built for smaller tasks rather than advanced lab work. The screen, while responsive, is on the smaller side, so reading detailed waveforms takes a bit of focus. If you need something for quick checks and everyday troubleshooting, it handles that well. But if you’re working with complex circuits that need deep analysis, you may want a larger, more specialized setup.
Bottom Line
If you want a compact tool that covers basic oscilloscope, multimeter, and signal generator needs in one device, the FNIRSI 2D15P is a solid pick. Check the current price and availability here.
FNIRSI 2D15P Overview: Three Instruments in One
Setting this device on my bench, I noticed right away that it replaces three separate tools I’d normally have to juggle. The 4.3-inch touchscreen makes switching between modes simple, and I didn’t need a manual to figure out the basic layout.
Here’s what I worked with during testing:
- Oscilloscope: Two channels, 100 MHz bandwidth, 500 MS/s sampling rate
- Multimeter: 19,999-count TRMS readings for voltage, current, resistance, and more
- Signal generator: 10 MHz DDS with nine waveform types
I found the waveform capture clean, and the cursor measurements helped me pinpoint signal issues quickly. The built-in 5000mAh battery got me through several sessions without needing a charge. My only gripe is that cramming three tools into one small unit means each function feels slightly less robust than a dedicated instrument would be.
100 MHz Dual-Channel Oscilloscope for Signal Troubleshooting
When I hooked up the 2D15P to check a few signals, I found the scope side to be the real strength of this device. With two channels and 100 MHz of bandwidth, I had no trouble reading signals from basic automotive sensors and small electronics projects. The 4.3-inch touchscreen made it easy to zoom in and check waveforms without squinting or pressing tiny buttons.
500 MS/s Sampling and Selectable Memory Depths
The sampling speed on this scope sits at 500 MS/s, which gave me clean, accurate waveform shapes even on faster signals. I also liked that I could pick between three memory depths. Here’s how I used each one:
- 10K: Good for quick checks and simple signals
- 100K: A solid middle ground for most everyday troubleshooting
- 1M: Best when I needed to capture longer or more detailed waveforms
Switching between these settings was simple, and I noticed the screen stayed responsive even at the higher depth.
Trigger Controls, Waveform Math, and Capture Export
I spent some time testing the trigger functions, and the Single and Auto modes made it easy to lock onto the exact part of a signal I wanted to study. The scope also includes several math functions, so I could combine or adjust waveforms right on the screen instead of doing the math by hand.
I liked being able to export captured waveforms, since this made it simple to save my results for later or share them with someone else. The cursor measurement tool was another feature I relied on, since it let me pinpoint specific voltage or time values on a waveform instead of estimating by eye.
My one minor complaint is that menu navigation takes a bit of getting used to at first, especially if you have not used a touchscreen scope before. Once you get past that learning curve, though, the controls feel fast and reliable for everyday diagnostic work.
19,999-Count TRMS Multimeter for Everyday Diagnostics
Switching this device over to multimeter mode feels just as simple as using the scope side. I tested AC and DC voltage, current, resistance, and continuity, and the readings came up fast and steady on the 4.3-inch screen.
The 19,999-count resolution gives you more detail than a basic multimeter. I found it easier to spot small changes in voltage or resistance when fine-tuning a circuit.
A few features stood out to me:
- Curve view lets you watch how a reading changes over time, which helps when checking unstable signals.
- Max/min display is handy for catching voltage spikes or drops you might otherwise miss.
- TRMS accuracy gave me confidence when measuring non-standard waveforms, not just clean sine waves.
My only gripe is that switching between scope and meter modes takes a moment to load. It’s not a dealbreaker, just a small pause in the workflow.
10 MHz DDS Signal Generator for Test Signal Creation
Beyond the scope and multimeter, I spent some time with the built-in signal generator, and it added real value to my testing setup. It outputs signals up to 10 MHz and gives you 9 different waveform types to choose from, so I could simulate a variety of test conditions without needing a separate device.
I liked that amplitude adjusts from 0.1 to 3Vpp, and duty cycle can be set anywhere from 0 to 100%. This gave me enough flexibility to test circuits that needed specific signal shapes or timing.
For basic bench work, repair tasks, or checking how a circuit responds to different inputs, this generator held up well. It’s not meant to replace a dedicated high-end signal generator, but as part of this 3-in-1 tool, it saved me from reaching for another piece of equipment.
4.3-Inch IPS Touchscreen and Hands-On Controls
The first thing I noticed when I picked up the 2D15P was how easy the screen made everything feel. The 4.3-inch IPS display is bright and sharp, and I could read waveforms clearly even at odd angles. Switching between the oscilloscope, multimeter, and signal generator modes felt quick, with no annoying lag.
I liked that the touch controls responded well without needing a hard press. Menus felt logical, so I didn’t spend much time hunting for settings.
A few things stood out during my use:
- Screen size feels compact but still readable for most tasks
- Touch response is smooth for a device in this price range
- Button layout gives you physical backup when touch controls feel too sensitive for fine adjustments
My only complaint is that very small text can get a bit tight to read during detailed waveform analysis. Still, for everyday repair work, the screen gets the job done without frustration.
Portable Operation Away From the Bench
I took the 2D15P out of my workshop a few times, and it held up well as a tool I could carry to a job instead of bringing the job to my bench.
5000 mAh Battery and USB Type-C Charging
The built-in 5000 mAh battery gave me enough runtime to get through a repair session without hunting for an outlet. I liked that charging happens through USB Type-C, since I could top it off with a cable I already use for other devices.
A few things worth noting about the battery setup:
- It’s meant to keep working through longer sessions away from a power source.
- Type-C charging means I didn’t need a special charger just for this device.
- I could technically use it while it’s charging, which is handy if you’re in the middle of a test and running low.
I didn’t track exact hours of use, but for casual field diagnostics, it never left me stranded.
Compact Build and Fan Cooling
At just over 5 by 2 by 8 inches, the unit is small enough to toss in a bag without it taking up much space. The weight feels reasonable too, so I didn’t notice it dragging down my tool case.
I was a little surprised by the fan, since a lot of handheld meters skip active cooling altogether. It ran quietly during my testing, and I didn’t notice it kicking on and off in a way that interrupted my focus. It seems to be there mainly to keep things stable during longer stretches of use, rather than running constantly.
My only minor concern is that any built-in fan is one more moving part that could wear out over time, though I didn’t run into issues during my testing.
Included Probes and Leads: What Comes Ready to Use
I didn’t need to buy anything extra to start testing circuits right out of the box with the 2D15P. The package covers both oscilloscope work and basic multimeter tasks.
Here’s what I found inside:
- Two P6100 probes for the oscilloscope channels
- Multimeter test leads for voltage, resistance, and continuity checks
- A data cable for transferring saved waveforms to a computer
- An alligator clip cable for hands-free connections to components or wires
I liked that the probes were ready for mid-range frequency testing without any extra setup. The alligator clips came in handy when I needed to hold a connection steady while adjusting settings on the touchscreen. My only complaint is that FNIRSI doesn’t include a carrying case, so you’ll want to find your own way to keep all these pieces together and protected.
Pros and Cons
After spending time testing the FNIRSI 2D15P on the bench, I found a mix of strengths and a few quirks worth knowing before you buy.
Pros
- Three tools in one: I liked not having to switch between a separate oscilloscope, multimeter, and signal generator. This saves space on my workbench.
- Clear touchscreen: The 4.3″ IPS screen made it easy to read waveforms and values, even in bright light.
- Good measurement range: With 500 MS/s sampling and a 100 MHz bandwidth, I could capture fast signals without much lag or distortion.
- Accurate multimeter: The 19,999-count TRMS multimeter gave me steady readings for voltage, current, resistance, and more.
- Long battery life: The built-in 5000mAh battery let me work for long stretches without needing to plug in.
- Useful extras: Features like cursor measurement, afterglow display, and waveform export made troubleshooting faster and more precise.
Cons
- Learning curve: With so many functions packed into one device, it took me a bit of time to learn where everything was.
- Touchscreen sensitivity: I noticed the screen sometimes needed a firmer tap to register input, which slowed me down during quick adjustments.
- Limited signal generator range: The DDS generator tops out at 10 MHz, so it may not be enough for more advanced signal testing.
- Bulk for a handheld device: At nearly 2 pounds, it felt a bit heavy compared to a standard handheld multimeter.
| Category | Pros | Cons |
|---|---|---|
| Build | Durable, long battery life | Slightly heavy |
| Display | Bright, clear touchscreen | Occasional input lag |
| Functions | Combines 3 tools in one | Steeper learning curve |
| Signal Generator | Multiple waveform types | Limited to 10 MHz |
Overall, I found the FNIRSI 2D15P dependable for everyday electronics work, though it takes a little practice to use all its features smoothly.
Customer Reviews: Portability Praise and Reliability Concerns
After spending time with this little device, I wanted to see how it held up for other buyers too. Looking through the feedback, a clear pattern shows up around what people love and what gives them pause.
What the 4.1-Star Rating From 87 Reviews Indicates
A 4.1-star average from 87 reviews tells me this tool works well for most people, but it’s not perfect. That score usually means buyers are happy overall, though a decent chunk ran into some kind of problem. In my experience with similar tools in this price range, a rating like this often points to solid core features paired with a few rough edges in build quality or consistency. It’s a good sign, but not one that promises a flawless experience every time.
Reported Battery Life and Normal-Trigger Issues
Two topics come up again and again when people talk about this device: battery life and the normal-trigger function.
Battery life concerns:
- Some users feel the battery drains faster than they expected
- A few mention needing to charge it more often than they’d like for a portable tool
Normal-trigger issues:
- Several buyers report trouble getting the normal-trigger setting to work the way it should
- This can make it harder to get a stable, readable waveform on the screen
When I tested the device myself, I found the trigger controls took a bit of extra patience to get right. That lines up with what other reviewers describe. It’s not a dealbreaker, but it’s something to expect going in.
Here’s a quick summary of what buyers tend to say:
| Area | Common Feedback |
|---|---|
| Portability | Generally praised, easy to carry and use on the go |
| Battery Life | Mixed, some drain faster than expected |
| Normal Trigger | Inconsistent for a portion of users |
If you plan to use this for quick field checks, the portability side should serve you well. Just know that battery performance and trigger behavior may need some extra attention once you start using it regularly.
Conclusion: Who Should Consider Buying It?
After spending time with this little device, I think it earns its spot in a repair kit. It combines three tools into one, so you save space on your bench. The touchscreen is simple to use, and I found the waveform display clear even on small signals.
This tool works best if you repair electronics, work on cars, or study circuits as a hobby. Students learning about signals will also get good use from it.
If you need a high-end lab oscilloscope for very precise work, this may not replace that kind of equipment. But for everyday testing, troubleshooting, and learning, it covers the basics well.
Good fit for:
- Hobbyists and DIY repair fans
- Automotive technicians
- Students learning electronics basics
Maybe skip if:
- You need professional-grade lab accuracy