Here's a new device that I find interesting in that it has 32 channels, over three times as many as the emotiv EPOC. http://neurogadget.com/2015/01/23/flexctrl-brain-new-32-channel-bci-headset-aims-speed-development-brain-technology/10795 Compare it to the VOIS ear dongle doodad, and one does tend to wonder how a single sensor device could be capable of much variations in cognitive functionality.