Currently, we are selling three ZapperBox models; M1 is a dual tuner device. M2 is a single tuner device and M3 is a client device without any tuner. All three devices can be used in any room to view any channel and any recording from any other device or its own connected storage and antenna. See a comparison between all three devices at this link.
Starting with version 4.0 we plan to start adding apps for other devices like Roku, Google/Android TV, and other TV operating systems. See our roadmap from DVR to gateway at this link.