Want to mount two devices off one RAM Mounts base? It's definitely possible. Of course it is. Why wouldn't it be, with over 5,500 different components available?
You've basically got two different options:
This handy little piece adds another 1" ball to your socket arm. So it lets you do something like this:
This option gets a little more unwieldily but can still be a good option, especially if you're needing your two devices to be further away from each other. It basically lets you start with one socket arm, then branch out into two socket arms, where you can then mount your two devices:
Either option will allow you to mount one (or more) devices off a single RAM Mounts base.