3 in 1 Handheld Oscilloscope Automotive Dual Channel 50MHz with Digital Multimeter and Signal Generator

Great digital multi-meter... really like the display and accuracy. Construction of the unit feels very solid and well made. The keys have a nice feel to them - the center navigation / menu keys are a bit clunky to press, but not overly so.I love everything about the user interface when it comes to the multi-meter stuff. Very easy to use.. you can select auto ranging and it does a nice job of dialing in everything. Display is very clear, even if you turn down the brightness to save power.Power is provided through any USB-C connector, which is nice. I charge my 703 up through my iPhone 6s lightening cable using an adapter that changes the connector over to USB-C - the ZT-703 doesn't mind one bit.The Oscilloscope function is pretty handy also. Now, if you are used to using a full fledged Oscilloscope, such as a Tektronix or Siglent or something, then this won't be quite that nice. To change stuff like the divisions or cursors, etc. it requires selecting different menus and pushing a bunch of buttons - there are no handy dials for that stuff. However, after a bit of playing around, you do get used to it. It's certainly usable for viewing simple signals, so long as you don't mind the somewhat crowded screen.I'm attaching a picture of using this scope off a 100 KHz signal from my Siglent waveform generator, which I was using to check some caps to see if they were dead or not. As you can see, the ZT-703 picks up the sine wave really nicely and also is able to correctly show the voltage levels, etc. Calibration of the unit appears to be good. If you start using square waves, the rise time and edges can get a little deformed, but for most stuff under probably 5 Mhz or so, I think this scope should be able to keep up no problem. I would think for automotive work or older PCB diagnostics this scope should prove to be handy.Also, as a starter scope or for someone unable to afford a $500 to $2000 Oscilloscope - and/or a younger person just wanting to have some ability to view wave forms - this meter really packs a lot of functionality at a rather low price. I will say, however, that the function generator feature in the scope is not really usable too much beyond just adjusting probes or making pretty pictures on the screen. Unless you are doing something that needs a very tame waveform, this meter should largely be thought of strictly as a digital multi meter and lower end / small digital Oscilloscope for hobby type electronics. It definitely is better than not having any scope at all and will certainly due in a pinch, but it's no replacement for even a few hundred dollar digital scope such as the Siglent SDS1202X-E, for example.One really nice feature is you can charge it up and go. If you need to something to check a signal in the field but can't drag a power cord to your job site, this meter could definitely be a life saver I think. Again, despite claims of 50 Mhz, I think we are probably talking more like 20 Mhz on a good day.All in all, I can highly recommend the ZT-703S. It's very compact, very well made and the functions it brings to the table for under $100 bucks are really something. Out of all the smaller DMM + Scopes out there that I have reviewed, I think the ZT-703 has to pretty much be the king of them from what I've seen. As long as you are operating under 10-20 MHz for sine waves and not too much more than perhaps 5 or 10 MHz for square waves, etc., then I think this device should meet most people's needs until they find themselves really needing either a larger display screen and/or capabilities above 50 to 100 MHz in a more professional level scope. And as far as a multi-meter.. it's a dream.

This is over if the most useful recent tool purchases I've made. As an automotive diagnostic specialist who frequently gets deep in signal and lab scope testing, I've often wished that someone would make a DVOM sized, ruggedly built 2 channel DSO. This multifunction unit answers that call and goes above and beyond. I don't use this to catch fast glitches, (I have a 100Mhz 4 chan for that) however it functions nicely with a low amp current probe to check electric motor fuel pumps and controls, injector patterns, primary and secondary ignition patterns, timing sensor signals, wheel speed sensor and data bus signals. And files can be saved and transferred onto a PC via the USB-C charging/data port. The built in DVOM does everything you'd expect with a crisp and easy to read display, auto ranging and manual range selection, also measures up to 10 amps of current before having to use a current probe. It has very long battery life, I've used it in scope mode for an entire work day and still had battery life to spare! The housing is very rugged, perfect and durable enough to withstand a shop environment.

Oscilloscope is a little slow for some applications but the dvom is great. Set up is easy

I bought this on a whim for testing digital tape decks. I have 13 scopes, not many portable, and wanted something that was convenient. Works exceptionally well but has a problem triggering sometimes. But the meter itself is very accurate out of the box. As good if not better than my agilent which cost 20x as much. The scope is very usable, not sure for automotive, but if you are checking voltages and suspect your meter, you can quickly clip on a scope probe. Overall very happy with it even though I bought a siglent SHS810X the same week, I decided to keep this as well, mostly because for a handheld meter, it was very, very accurate out of the box! Whether or not it stays that way is to be seen, but it must have a very good calibration system.

Unbelievble scope for $80 bucks. I have a bench scope but this is a meter sized device that takes you to a place where when you just meter thing in the field, you can also have a look at wave shape and noise, it gives you a new dimension and it painless.

Excellent quality for the price. Haven't had it a month yet, but functions accurately and looks like it will last.

I bought this for testing electronics equipment in my boat. It's small and well made. The display is clear and easy to read. Cables and probes are good. Instructions are OK. If you don't know how to use a scope, you don't want this.

The DMM function is surprisingly good. That's what I'm using it for most. It's not the fastest DMM but it's reasonably quick and accuracy is better than spec.There are two signal generators. Both output on a pair of lugs under the silicone tab that protects the USB port. The first is on whenever the scope is on and defaults to a square wave for probe calibration. This is not very configurable, but it can be used with the scope. The other is an app accessed from within the oscilloscope function and can't be used at the same time. It has a little more flexibility.The scope is the main attraction. Unfortunately bugs and limitations make it less useful than I'd hoped. The bug that vexes me most is that it does not correctly track the horizontal trigger position when zooming or panning the waveform. The buffer is cyclic, the caret for the trigger position can end up anywhere and it becomes impossible to tell where the real trigger position was or where the end wraps around to the beginning. If you want to see more of a waveform than fits on the 320x240 screen you'll likely get lost as caret jumps around with no apparent rhyme or reason. Also, the only thing it can save is a 320x240 screenshot.