Premium Materials: This knee massager is made of high-quality diving fabric, offering excellent elasticity and a soft touch. The lightweight knee heating pad is easy to carry, allowing you to use it at home or in the office.Ideal Gift: This knee massager comes with an AC data cable (charging head not included) and offers 3 years of customer support. You can also give it as a thoughtful gift to your family and friends.Wireless Convenience: With a built-in 5000mAh rechargeable battery, this heated knee massager is completely portable and can be worn without a power cord. You can easily place it on any painful area and continue what you're doing; it won't hinder your activities or fall off.3 Vibration Modes and 3 Heating Levels: This heated knee massager offers 3 vibration modes and 3 heating levels (113F, 131F, 149F). It also features two vibration motors for deep massage of the knees, elbows, and shoulders.3-in-1 Heated Knee Massager: This 3-in-1 heated massager can be used not only on the knees but also on the elbows and shoulders. The knee heating pad comes with two extension straps of different sizes, which can not only fix the knee massager in place, but also be used on the arms, thighs, knees, calves and ankles.