2.8 Inch Handheld Digital Oscilloscope 120M Bandwidth Dual Channel Oscilloscope Signal Generator 500MSa/s Support XYmode/Single Trigger/FFT Spectrum

This is an excellent scope for the price. But it has some limitations.I think that for audio, and low MHz work where portability (e.g. battery powered) is desired the DSO2512G is an excellent choice. Unlike the cheaper 5012H scope I bought last year, this DSO2512G scope has two channels and vertical sensitivity is extended down to 10mV/div (from 50mV/div in the 5012H). And it has a built-in signal generator that seems very capable and useful for audio tasks (though no sweep capability/etc of course).In my opinion, the one place that a user needs to be careful is in the frequency response and alisasing issues. This is NOT equal to a typical modern 100 MHz scope. It seems more like an early-vintage 40 MHz digital scope to me.Unlike more expensive modern scopes, this thing aliases if the input signal contains frequencies or harmonics above 100 MHz. I attribute this to its lower sample rate and lack of anti-alias filtering in the vertical channels. As a simple test, I fed it sinewave signals (from a 50 Ohm source TinySA) going from 10 MHz through 120 MHz in 10 MHz steps and observed the waveforms and the frequency readout. Everything looks OK until I hit 100 MHz, where the amplitude collapsed to about 10%. Above that, the amplitudes came back, but frequencies folded - e.g. 110 MHz shows up as 90 MHz, 120 MHz as 80 MHz, etc.Another limitation is memory depth. The depth is definitely useful. For example, I could capture a 50 MHz signal at 2 us/div using RunStop or the single-sweep mode and then drop the timebase down to 5 ns/div and pan through it to examine any portion of the 50 MHz sinewave, beautifully displayed (except for the expected distortions at intermediate time settings due to the screen resolution limitations. But there are issues if I capture at 5 us/div or longer. Then the expanded waveform is aliased and displays incorrectly. This suggests that I'm getting something like 4800 samples total (there are 12 horizontal divisions). Definitely useful, but a far cry from a $300+ scope that has 1M+ memory depth that allows sample rates to remain high even at us or ms timebase settings.Finally, the internal sig-gen: This is neat to have - especially if one doesn't have one already - and it worked as advertised, with a fixed 2.5Vpp output. Of course that could be dropped with an external potentiometer. Output impedance is not specified, but I loaded it with 50 Ohms and the measured amplitude dropped to about 0.7Vpp - so maybe 130'ish Ohms for Zout? Visually, the sinewave is good, but on the FFT, it shows harmonics at -20 dB or so. This is not great, but seems consistent with the step-size observed if I zoom in on an edge - about 20 mV/step unloaded.Bottom line, this is a great scope, priced right, IF one is realistic about its capabilities and limitations, and has the right use-case. Someday I may get a $300+ scope like a Siglent SDS1202X-E 200 MHz, 1 Gsps unit with 14M sample-memory. But it's almost 3x the price, is not as portable, and doesn't have a sig-gen included by default like this nifty DSO2512G unit does ! Kudos to the developers of this product.

If you have a bench and you need to measure wave accuracy, then get a "Real" Oscope. But a lot of times, working out in the field on some machinery, you're just signal tracing. Good waveform here, yep, - good waveform over here, yep, - but no waveform there. It's portable, its battery operated, it gives you eye candy. That's why you need an Oscope sometimes instead of a DVM.

Small but useful. Instructions are fair. Not difficult to learn it's operation. Handy.

Would be better if unit came with manual for the features and menu's.

I already have 5 other oscilloscopes including Tektronics and some other well-known name brands. But all of them are too large to haul around to applications in the field. I needed something that was hand-held so I have been watching Amazon for several years now waiting for something that would meet my needs. My minimum bandwidth was 100 MHz but the available scopes that met this requirement just didn't meet my overall requirements for sensitivity, screen size, and ease of use.Then I saw this little unit marketed under the name Leolov. Quite frankly, I'm impressed. I tested it thoroughly and it does indeed work past 100 MHz with amazing accuracy. The display is attractive and stable. I generally only use the "AUTO" button and it immediately locks on to the waveform. You can override this if you want, but there are menus and sub-menus to memorize if you want to know all the functions. This is the only downside to a handheld portable scope, but there is no away around that so I fully accept that I have to learn where all the functions are. This little scope has so many features it will take you a while to learn them all. There is not enough room here to list them all.Overall, this is a real working scope that does what it is supposed to do. I now find myself using it more than my regular scope for quick field testing. It's a great value so I highly recommend it if you are looking for a truly small portable oscilloscope that can do practically everything the big scopes do.