FNIRSI DSO152 Oscilloscope - 2.8" TFT Handheld Digital Oscilloscope Kit Portable Oscilloscope, 2.5MS/s High Sampling Rate, 200KHz Bandwidth, Trigger Function Auto/Nomal/Single

I was gonna return this little guy because it was aggravating I was operating and didn't know what I was doing lol but after I continued to play with it it became easy to handle my gains on my 2 amps are set perfectly the sound is designed how it's supposed to be heard and all speaker are in sync I'm definitely keeping this item in case I upgrade my amplifier no returns for me this is a gadget to keep

this earns 5 stars because of it price. it does work well enough for a simple hobbiest, i use it to help diagnose automotive sensors and it works VERY Well for that!

Be aware of the size. Somewhat hard to read. Performs as advertised. Connections are solid

Played with it some, cal'd it with the built in source. For $30ish? Awesome. Wont be replacing my main scope but perfect for bringing out to the garage or checking something simple

Helped me perform tests I needed for setting up a complicated power amplifier for my car's audio system and for an extremely amazing price. I love this oscilloscope.

This is not a fancy unit and will not replace a bench oscilloscope but is great for simple tasks. I’ve only had it for two weeks and I’ve already used it twice.Use 1: I was getting flickering LED lights in my home when on generator power. My multimeter read 245V between the two hots and the sine wave was solid but the sine wave inside the home was all over the board. Some troubleshooting later and I diagnosed a bad neutral bond on my generator disconnect. I initially thought it was a bad generator, this oscilloscope saved me the hassle of a needless warranty claim.Use 2: I bought a new UPS from Costco and it said “simulated sine wave”. Being that I wanted this for some sensitive/expensive electronics, I wanted to see how bad the simulated sine wave was. See my pictures for how bad it is, the first is line power and the second is on the UPS’ battery.

This is a nice little gadget at an amazing price. However, the frequency range falls short so this is not usable beyond audio frequencies Also, the auto function is finicky and measurements are not reliable. With better software this would be a great product, but right now I would not recommend it.

When I think back to the many hundreds of dollars for a decent O'scope decades ago, I was skeptical to say the least, but I gave it a shot - for $30 bucks (returnable), why not?Since I've been running on generator for several days, and my electric clocks were running way fast, yet the generator was at 60 cps +/- 1, I was concerned about harmonics or distortions..I received the unit this morning, charged it fully, calibrated the 1x/10x probe (yes, the provided tool fit the adjustment cap on the probe just fine) and it calibrated beautifully on 10x. After reading the included manual and playing with the unit a few minutes getting familiar with it, I checked the generator output and confirmed there are some minor artifacts on the sine wave, but not anywhere near as bad as I feared.If I had any complaint, it's that I didn't look for a dual-trace scope so to check phase relationships on the generator's 208 output, but that's on me.The parameter readout on the screen (Voltage, Freq, etc.) is clear, the waveform trace is sharp. Auto dialed the appropriate settings right in on the sampled line, quick selection of the parameters with the "Track Wheel" and adjustment of each with the up and down buttons was almost instinctive.. This is a very cool instrument.Maybe someday I'll have the opportunity to compare it to a calibrated Tektronix scope standard, but I suspect it will be pretty close, certainly "good enough for field work".Full case around the unit, the probe's MCX interface connector is tiny and looks like it could be fragile, so treat it like it's much more expensive than it is and you'll probably be as happy with it as I am..