It may not have FDA approval, but the noggin-shocking Foc.us headset recently passed through the FCC for certification. The unit utilizes transcranial direct-current simulation on the prefrontal cortex of the brain (forehead), which is claimed to improve short-term memory and cognitive function. Currently pitched as a cranial performance enhancer for gamers, Bluetooth 4.0 low energy connectivity allows it to be controlled via a smartphone app. Snake oil or not, Foc.us is still set to ship this month, and you can relive our weird and tingly experience with it in our hands-on.