SPECIFICATIONSApplication: LeGBrand Name: VIMYSHOWCertification: RoHS,CE,FCCChoice: yesElectronic: YesHigh-concerned chemical: noneIs Batteries Included: YesItem Type: Massage & RelaxationMaterial: Composite MaterialModel Number: HY104Origin: Mainland ChinaVoltage: 50V AC NOTE: Our product is a wireless heating device. To comply with air transport regulations, it must be fully discharged before shipping. Please charge it first before use. Thank you! Please charge 2-3 hours before use. Thank you for your understanding! 3 IN 1 PAD WITH VIBRATIONIt's not only a knee brace but also works for shoulder, elbow, arms, thighs, calves, or ankles. We have extra straps for using it on other parts of the body, that enable the massager to be used on nearly any body part. WIRELESS MASSAGE PAD: Built in battery, the knee massager is completely portable and you can wear it without being tied down by a cord. You can quite easily put them wherever and continue about doing whatever it is you're doing without it getting in the way or falling off. Comes with Type-C charging cord. 3 levels ADJUSTABLE: This knee warmer has 3 levels. Works well for enhances blood circulation. Also, 3 vibration modes providing great relax and comfort for your knee, elbow and shoulder.Theres options for different massage settings. EASY OPERATION: Long press the button for 3 seconds to turn on/off the massage knee brace wrap. Fix the massage device at the knee/elbow/shoulder position. Then touching the vibration button / other button to turn on the vibration function / other function, touching it again to adjust the intensity. PRACTICAL GIFT IDEAS: Great device to have in hand for elder, man, woman, it's adjustable so different sized people can use it. Good Christmas gifts, Thanksgiving day gifts, Fathers Day gifts, Mothers Day gifts or daily gifts for your mom, dad, family, friends, teachers , beloved ones, and more.