Question about Lenovo Active Pen 2

i have an ideapad c340 and the pen works for me. according to the lenovo customer service, this is supposedly the only compatible pen from the lenovo range for the ideapad c340 (but i'm not sure if you can trust this statement so easily ;))

Which model? There are two Active Pen 2.
Manufacturer's ref. GX80N07825 / 5T70M55297
Manufacturer No. 4X80N95873