Until now, Halo Neuroscience's signature brain-bending headphones were only available to very specific groups: college-level athletes, pro athletes and the military. They helped build up hype for the eventual public release. That all changes today, however: you can buy your own set of Halo Sport headphones for $699. As before, that high price stems from the Sports' "neuropriming." The over-ears send electrical currents to your brain that, at least in theory, make it extra-receptive to training. You won't be inherently faster or stronger, but you might hit your goals sooner than you would otherwise.