Its first wearable device, priced at $199, promised to energize you with a few zaps of electrical pulses to the neck.
Now, the startup Thync is developing a new model aimed at reducing stress. After sinking $30 million into research and development at Thync, the team set out recently to test the second-generation model — in a trailer park in Warren, Mich.
It’s collecting some positive reviews. But the science behind the buzzy new technology?
