MUTUAL OR SELF CAPACITIVE TOUCH SENSOR?

Hello!
So this question might be stupid but I have tried googling it like crazy and did not get an answer. I have to make a presentation for school about dfr0030 capacitive touch sensor. However, I have no idea whether it is a mutual or self capacitive sensor.
Any kind of help would be greatly appreciated!
Thank you!

OK, I had to look that one up.

As I see only one electrode on that dfr0030 capacitive touch sensor my money is on the simpler, cheaper self-capacitive version.