Points:1、2200mAh built-in lithium battery is rechargeable designed. It is easy to carry and easy to use with low noise during operation. It can quickly release fatigue and pain after exercise2、Material: EPP environmentally friendly material, low density and high hardne. High wear resistance and long-term durability3、Four-speed powerful vibration maage to quickly restore fatigue, relieve pain and quickly eliminate muscle fatigue. Exercise beautiful lines, tighten muscles and tighten elasticity.4、Applicable people: sports enthusiasts, sports enthusiasts, fitne instructors, high hardne inner tubes, more convenient to use, long product life.5、Safe: It features all-round vibration maage to eliminate physical fatigue. It is quiet, safe and rechargeable. It can make you relax easily anytime, anywhere! Deep maage + vibration maage, high density EPP environmental protection material. It is not easy to be deformed. The deep tiue maage is convenient, It features good elasticity and good bearing effect.Specifications:Productsize:abouthigh300×diameter1mm/5.91inProductquality(about):8gMaterial:foamedpolypropyleneBatterylife:uptoabout180minutes(level1)~minimumtimeofaboutminutes(level4)Chargingtime:about3.5hours(fullcharge)List:Electricmaager*1Charger*1