Ensuring that wearers get a good night's sleep is the goal of the Thync Relax Pro. The device affixes to the back of the neck and uses low electrical pulses to stimulate the wearer into either falling asleep or achieving a state of deep relaxation. What the device does can be controlled via an app.
Thync says that wearers of the Relax Pro will be ready to fall asleep within 10 minutes of using the wearable. The device isn't designed to bring on sleep at any time of the day, though. It's more of an aid that helps someone who is already tired finally get to sleep. The Thync Relax Pro is priced at $149 but can be had for cheaper ($29/month) if buyers opt for the temporary pads which need to be replenished monthly.
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Doctor-Approved Posture Wearables
Inexpensive Activity Trackers