The
Amcrest IP2M-841 (re-branded Dahua) could also serve your needs, I think. It's ONVIF compatible, provides RTSP, is 1080p,
2-way audio plus mike in/speaker out, has pan/tilt/digital zoom, wired or wireless and has alarm in/out,
great with Blue Iris, VLC, etc. Available in white, black or silver for under $60.
I have installed it and it's lower-res cousin (720p) , the
IPM-721 at 5 locations and no hiccups after 3 years.