1.This sleep instrument uses EMS micro-current to help you fall asleep easily and quickly, reduce stress and get better sleep quality. 2.Pure physical improvement of sleep quality, non-, no chemicals added, no side effects, no dependence, no harm to the body. 3.Two modes (sleep mode/excitement mode) and the intensity of 15 gears can be adjusted to meet the needs of different people. 4.It is very suitable for people who are stressed, easily anxious and depressed, have difficulty falling asleep and easily wake up in the middle of the night. Color: Green Material: ABS Package Contents: 1 x Sleeper 1 x USB charging cable 1 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.