I am well aware that this tablet is compatible with EMR based styli; however, after browsing this forum for around 20 mins I found out that some electromagnetic ones aren’t compatible. Anything but Wacom isn’t considerable because it’s the only available producer in my country. These are the styli I currently can choose from
Wacom Bamboo pen for CTH 461 and CTH 661
Wacom Bamboo Fun pen 1st gen.
Wacom Bamboo Smart Stylus
Note that the first two are more desirable because their price is considerably lower here.