Features: brand new and high quality Excellent appearance and thoughtful gift,our sleeping instrument has simple design and a little matte textur, which is conforms to the design of people's hand grip. light weight sleep instrument is a best gift for your friends and family who have poor sleep quality. 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. Two modes can be choose,two available modes of operation, low frequency decompression mode and high frequency encouragement mode. turn on the power switch to choose the frequency that suits your body sensation.rotate the for key to right increase power ,rotate the for key to left decrease the power. USB fast rechargeble,the package come with USB cable, 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. Use instructions,regulate mood by microcurrent, thus promote sleep. hold your left hand to divert attention, relieve anxiety feeling when low frequency mode. holding with your right hand when in high frequency, excitement to refresh the mood and concentrate yourself. people with anxiety and depression are advised to hold each hand for 20 minutes each for time, morning, midnight and night. people with insomnia are advised to hold for 20 minutes before going to bed or hold their hands to sleep. Specifications: Material:ABS Battery capacity:300mAh Input Voltage:DC 5V~3.7A Adjustable Gear:15 Gears Charging Port:USB Control Mode:Key+Rotating for Key Color:White/Green/Black Optional Note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the pic may not reflect the actual color of the item. Package includes: 1 Piece Host 1 Piece USB Cable 1 Piece Chinese and English Manual