Hand-Held Sleep AidThe sleep aid can help people with insufficient sleep fall asleep sooner. Microcurrent stimulates neurotransmitters in the cerebral cortex, regulates emotions, and Sleep Aid. Just holding the device can make you more relaxed, it can relieving anxiety and releasing stress. It has 5 levels of intensity. This sleep tool uses USB to charge, small and exquisite, easy to carry. Whether its a business trip or travel, you can use it anytime, anywhere