Advanced technology - CES Micro electric current stimulates neurotransmitters in the cerebral cortex to regulate mood and promote sleep. The use of this sleep aid device can properly stimulate the hand, with the hand brain frequency consistent way to relieve anxiety. Stimulate acupuncture points, promote relaxation and release pressure, so you can sleep peacefully. 2 modes to choose from: Low frequency mode, and High frequency mode. The sleep aid is in your right hand. Hold the device in the palm of your hand so that the electrode is centered. When you feel tired and need more energy, we recommend using High frequency mode. Fast Sleep aid This sleep aids mainly helps sleep deprivation, poor mental quality people, to help you fall asleep as soon as possible. Stress reduction helps you fall asleep faster, relieve stress, and improve sleep quality. Safe and Effective: Master your slumber without the long-term effects of sleeping pills or other chemicals! Our sleep bracelet is safe, non-toxi, and designed to be gentle on your skin even when you sleep with it tucked in your palm. Long-Lasting and Rechargeable: This sleep instrument comes with its own USB charging cable, and features a 300mAh battery capacity that can last for at least 20 hours. Now you can get peaceful, uninterrupted sleep