Description: Material: The sleep aid device is made of PP and stainless steel material,uses EMS microcurrent to help you fall asleep easily and quickly, relation stress, and improve sleep qualityFeatures: Hand held sleeper with purely physical to improve sleep quality, non-, no added chemicals, no side effects, no dependence, no harm to the bodyRechargeable: The sleep device is USB rechargeable,long standby time, providing you great sleep timeAdjustable: The sleep instrument with two modes (sleep mode or excitement mode) are adjustable to meet the needs of different groups of peopleWidely Use:Sleeping aid machine is very suitable for people who are under great pressure, prone to anxiety and depression, have difficulty falling asleep, and wake up easily in the middle of the night Specification: Material:PP, Stainless Steel Size Chart: 8cmx5cm/3.15inchx1.97inch Package Includes: 1 Sleep Aid Device Note: Please allow slightly errors due to manual measurement and different monitors.