USB charging, 15 minutes Running time, can effectively relieve physical fatigue and improve body function Small size,lightweight,easy to carry and storage. You can perform an electric self-massage at home, in the office or on the car 5 modes and 10 kinds of gear massage intensity, to meet your different massage needs Massage part: neck / back / waist / hip / leg and other parts. Massage technique: shiatsu, kneading, tapping, massage Relieve tension and muscle sensation: increase blood flow, relax muscles, reduce fatigue, promote blood circulation, relax all day, smooth the meridians. Specification: Material: metal + plastic Size: 13x6.5cm Usage mode: 5 modes Frequency: 1 ~ 100Hz Running time: 15 minutes Output current: up to 9.8mA 10 modes adjustable, meet different needs. Package Includes: 1x massager 1x patch 1x manual 1x charging cable Note: Conversion: 1inch=2.54cm, 1cm=0.393inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience