Product description: The use of physical therapy, the ultra-low frequency wave through the left hand pericardial area to the brain, effectively reduce the frequency of brain waves to quickly stabilize the mind and enter the sleep state, 30 minutes before going to bed every day, to help you quickly enter the deep sleep without side effects, by reducing the frequency of brain waves to quickly stabilize the mind and enter the sleep state, the elderly, young students can use.

Product information: * Product size :14*60*60mm * Battery capacity :600mAh