This Cheap Oscilloscope Works Great With Synths | FNIRSI-138 Pro

I bought this cheap oscilloscope on Amazon. As I thought it would be fun to use with my Modular Synthesizers, I find it interesting to have something with a visual reference to what is going on in a synth with the audio, and control voltages.
Now I don't expect this to be a very acurate, but it seems to work well.
This version I have is powered by USB, but there are slightly more expensive versions that have a rechargable battery in them. I did buy an addition BNC to 3.5mm TRS cable to make connecting to my synths a bit easier.
In this video, I have it hooked up to the Audio output of a Doepfer Dark Energy. and I am going through some of the controls and features to show how well the osciloscpe works.
My only complaint is that there is a lot of button pressing to change any of the settings on the oscilloscope.