>>2952480
This is how it looked when I bought it. (I had to screenshot it to show support.)
The red text refers specifically to the drying function. It states it's compatible with the P1S multiple times.

At the bottom in black text it mentions that filament buffer, but it doesn't state that it's sold separately or anything.

I should have done more research, but I guess it took them at the "Compatible with P1 series" as being... I guess that it was compatible with P1 series.