This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Mendi is a headband that claims to help you ...

A few weeks ago, I ducked out of the office to take a nap at a hotel — for journalism. Neurotech startup Elemind offered me the chance to try out its high-tech headband, which promises to put you to ...