After more than a dozen Thync sessions, I’d consider keeping one around to use when I need a chill pill or some encouragement to go to the gym. It’s not a perfect replacement for coffee or wine—more delicious, not to mention social, ways to shift my state of mind. But Thync is a drug-free alternative. It’s just less well understood.
Getting the hang of digitally vibing out takes a few days. The hardest part is applying the tortilla-chip-shaped gadget to your head so it can access the right nerves. Pick the wrong spot and you get the brain-freeze effect; place it too loosely and you get a burning sensation. It uses a gooey disposable strip (sold in $20 packs of five). The other end of the strip goes behind your ear or at the base of your neck to allow the electricity to complete a circuit.
There’s potential for user error, though not self-harm, Thync says, if you follow instructions. (Thync provides guidance via a manual, online videos and live chat.)

Source: This Gadget Gives You a Low-Voltage Pick-Me-Up – WSJ