A:Answer The surface RT line was produced back when they were still using wacom technology for the tablet digitizer, this pen will unfortunately not work with that model. However, a wacom stylus from around that time, such as one meant for the intuos creative line of drawing tablets, should work just fine. To my knowledge, as well, any surface stylus meant for the Surface Pro 1 or 2 should also work for the Surface RT. The S-Pen from a Galaxy Note 5 would also be compatible.
IIRC the attached Wacom Pen should be compatible with the early RT, and Pro 1/2 tablets from my experience. As these tablets used non "active" styli that did not require batteries, and functioned the same way as the wacom stylus.