Product Information 1. Carbon fiber yarn, low power consumption, outer layer is made of SBR diving material to keep warm. 2. After power is off, residual temperature is still locked, durable and not easy to break, soft and foldable. 3. More fitting acupuncture point is located to increase heating area of gasket, full covering knee, and wrapping comfortably. 4. Knee pad is 41cm long, wrapping range is longer, and center is hot, effectively preventing knee from catching cold and relieving pain. 5. Lined with a storage bag, and can choose to put a herb bag such as a wormwood bag according to situation, and more obvious hot compress effect. Specification: Item Type: Electric Heating Knee Support Material: Diving Material Instructions for Use: Connect power supply or a small power bank (this product does not have a battery), press and hold switch, respectively, high-grade temperature red, medium-range white, low-grade blue, click to adjust, long press again to turn off heating Plugin Method: USB Port Package List:1/2pcs Electric Heating Knee Support Note: When using electric heating products, it is recommended not to cover clothing with blankets