Product parameters: Product name: Sleep aid Battery capacity: 300mAH Charging voltage: DC5.0V Battery life: 20 hours Material: ABS Color: white, blue Suggested use time: 15 minutes time Two modes: Put the front of the sleep aid in your hand completely, press the power button for low frequency, two available working modes, low frequency decompression mode and high frequency excitation mode Feature: 1. Sleep aid is mainly to help people with sleep insomnia and headaches relieve anxiety and psychological quality, and help you fall asleep as soon as possible. 2. Relieving anxiety and stress helps to fall asleep quickly, relieve stress, and improve sleep quality. 3. Stylish, simple, and lightweight design, convenient to put in a handbag, and easily charge and power via USB. Packing list: Sleep aid 1 Manual 1 USB data cable 1 Notes: Sleep aids may be effective on the human body, but the effect may not be satisfactory. This is not a product quality problem.?Best gift?Using this product, you can help you fall asleep faster and relax completely during sleep. For friends with sleep problems, this is a good gift. ?Features?Light weight sleep aid machine, easy to use, can be used for sports, walking, can be worn anytime, anywhere, so you can get relief insomnia headache pressure and anxiety device. Can be used in any need. ?Improve Sleeping Quality?The sleep aid instrument facilitates self-control of the mind by stimulating the palm , it mainly helps people with insufficient sleep and poor psychological quality to fall asleep as soon as possible. ?USB Fast Rechargeble?USB charging speed and easy to use. You can charge by computer, power banks and mobile phone charging heads. It's convenient for you to carry whatever you business trip or journey. ?Quick Sleeping Help?The latest sleeping instrument, helps people with lack of sleep to relieving stress and fall asleep quickly. Relieving anxiety and depression, improve sleep quality.