Product size (cm): 8.5*4.5*2CM Rated input: 5V/A, Working time: The battery life is about week (wearing 4 hours a day), Rated power: 0.4W, Battery capacity: 200mAh/3.7V Product list:: posture corrector*, manual*, USB charging cable* ✿【?????????????? ?????????????????? ????????????????】-- Ultrasonic Portable Lymphatic Soothing body shaping Neck Instrument is believed to boost our Lymphatic system and how effective our Lymphatic Drainage can be. It can assist in the process of our bodies by allowing the lymphatic system to drain fluids much faster and easier that may be carrying ???????????????? ????-???????????????? and other wastes. ✿【Ergonomic Design】-- Use high-quality and malleable materials to make a U-shaped neck massage that fits the curve of your neck. it won't slip, so there's no burden on your shoulders. ✿【Scientifically Correct Sitting Posture】-- Sitting Posture Correction Belt can exercise the back muscles, cultivate the habit of straightening, develop muscle memory, and develop a good habit of straightening the back in 21 days. ✿【Good Blood Circulation】-- The Ultrasonic body Shape Neck Instrument help blood flows to organs and tissues throughout the body. Through waves which the Instrument emits it helps dissolve blockages (stenosis) and abnormalities like plaque or emboli. ✿【Widely Use】-- Suit for sedentary office workers, people with bowed heads, is the ideal tool for body cleansing and reduced w-eight. Help correct wrong body posture of back and shoulders, improve hunchback, correct body posture, protect eyesight, and reshape beautiful curves.