Color box packaging, packaging size 69.5 31.5 29mm.5.Customer service: our responsive customer service team is 100 committed to providing the best experience when purchg massager! If you have any questions or doubts, please contact us and we will reply as soon as possible!. 4.Pure physical action, no dependence,If you have metal implants, they are not allowed. 3.Low frequency electrical pulse stimulation is applied to the palm, which is transmitted from the nervous system of the hand to the brain stem to realize the same frequency of the hand and brain, which has a positive effect on neurotransmitters such as endorphin and melatonin, making the human body more calm and relaxed. 2.Ces transcranial microcurrents can enhance alpha waves in the brain increase neurotransmittersv relax your mood before bed help brew sleepiness and help you sleep through the night,reduce drug dependence and improve sleep quality. 1.Through the palm Laogong acupoint to the brain to produce sedation, relaxation signal, promote healthy sleep.