Features1With heating function: The heating function can promote blood circulation, further relieve muscle aches and cramps, and help reduce joint pain, muscle stiffness and joint swelling. 2An ideal gift: Knee brace provides enough calories and relief for people suffering from chronic knee pain, meniscus tear and muscle pain. 3Method of use: Short press the button switch to adjust different temperature modes, relax the knee muscles, and speed up the healing time throughout the day. 4Scope of application: Knee pain relief is suitable for walking, driving and office work. 5Material: Knee massager is made of lightweight, breathable neoprene, which is fully adjustable to fit most people's body size.SpecificationItem Type: Knee SleeveMaterial: NeopreneTemperature: Green Light: Lowest Temperature Range is 45 to 50Blue Light: Medium-temperature Range from 50 to 55Red Light: Maximum Temperature-temperature Range is 55 to 60Purpose: You Can Enjoy Heat and Blood Circulation Promotion in Many Situations, Whether You Are Walking or Driving or Working in the OfficePackage List1 xKnee Sleeve