Knee joint relief: The wide heating area and 3D surround massage design bring full warmth and comfort to your knees. The heating area is large, continuously providing concentrated heat, penetrating deep into the skin, reaching the muscles, and relieving joint discomfort. Product difference: The standard model is equipped with a 2000mAh battery, hot compress and five-speed adjustment. The standard model is equipped with a 2000mAh battery, display, fixed, three-speed vibration mode and five-speed hot compress. This model is equipped with a 2000mAh battery, detachable host, LCD digital display, three-speed vibration mode and five-speed hot compress. High cost performance: Our knee joint relief instrument does not have the same effect as other similar products, but in order to avoid accidents, we provide an extension belt for each product in case of emergency. And the two pieces can be used interchangeably for your convenience in cleaning. 3 massage modes, temperature selection: You can choose the massage frequency and heating temperature according to your own situation and preferences. Relax the joints and promote blood circulation.