You can use it for a head massage for about 15 minutes before bedtime. It helps you sleep and improves blood circulation. Light and convenient to use, easy to use, can be used in the office, home, yoga, travel, beauty, and health. 15 minutes a day to relieve headaches, let go of insomnia. Elastic strap with buckle to adjust the length, suitable for the whole family. USB fast charging, high practicability, 15 minutes each time, about 20 times when fully charged. Built-in automatic timing system, automatically shut down after 15 minutes of work each time, without manual operation.