klipper is the firmware flashed to the printer
gui is achieved and accessed through mainsail or octoprint. I haven't tried octoprint.
mainsail runs on a raspberry pi and can manage multiple klipper printers with one device. you can also add klipperscreen, it's an addon that can be used with a touchscreen for an interface at the printer (or anywhere really)...
but I just access mine running mainsail through my phone browser or the laptop I use to model and slice. I like orcaslicer because it integrates mainsail right into a tab in the slicer and provides a seamless user experience.
curious machine. I'm surprised to see such mediocre specs with that price tag.
claims to be industrial yet uses 1.75mm hot end and can't print any industrial grade materials