Switch Interface Pro
It requires no software and can be used with Windows, Mac, and Chromebooks! Five ports allow you to plug in multiple switches and provide the flexibility of emulating everything from a single-click to a return. Consequently, your students gain access to the widest variety of switch-accessible software available. You’ll be surprised with what your students can do—run a PowerPoint presentation, play and pause a music player, and turn pages in an eBook.
Just push a button to change function sets. Connect up to five standard switches to run switch-enabled software from the widest variety of publishers. All the information you need to operate the switch interface is printed right on it. Teachers get programs up and running in seconds. Bright indicator lights tell teachers which functions are active. Connects to USB ports and the extra-small size makes it easy to tuck away and travel. Each interface comes with the cables needed for connecting to the computer.
More information: http://donjohnston.com/swip/#.U20hcFd3JEg