Feature:1. [Grasp Design] Sleep instrument conforms to the human grasp design, simple, light and comfortable, and sleep deeply after use.2. [Relieve Headaches] Sleep aid machine can moderately relieve headaches, help you get rid of insomnia, anxiety, sleep problems, and help you get a good sleep.3. [Easy to Operate] Sleep instrument is light and portable, easy to operate, light in weight, small in size, USB charging speed, and easy to use.4. [Improve Concentration] Use sleep aids in the office or study area to help you variorum on important matters and complete work and study efficiently.5. [Applicable Scenarios] Sleep aid device can relieve migraines and other functions, and can be used in offices, homes and business trips.How to Use:1. Wet hands first, not too dry2. The raised electrode is opposite the palm to form a micro current loop3. Use the rear boot and select a comfortable gearSpecification:Item Type: SleeperMaterial: ABSInbuilt Battery: Lithium Battery 150mAHStrength Adjustment: 3 Levels Package List:1 x Sleep Instrument1 x Lanyard1 x User Manual1 x USB CableNote:Ship with Inbuilt Battery