Heating Knee Pads Knee Brace Support Pads Thermal Heat Therapy Wrap Hot Compress Knee Massager for Cramps Arthritis Pain Relief Features: 1.It's specially designed for knee, but can be used on calf, thigh, arm as well if need be. Adjustable hook and loop straps closure, 2.it can fit a knee circumference not over 21 inch. 3.We have more temperature settings for choice, can meet people's various need of heat therapy. Great for use when you're watching TV or reading book on sofa at home, when you'reworking in front of computer, or even during your travel. Functions: *Relieve knee pains associated with arthritis, bursitis, strains, sprains, ACL PCL MCL meniscus tear *Aid in knee injury or surgery recovery *Leg or arm muscle fatigue soreness, cramps relief *Knee warm keeping;Other situations that need hot compress *The heating pad has a built-in mesh bag (13.5*18cm), if need be, put a ice bag in, it can be used for cold compress. Washing Method: Wash it gently by hand in water, don't wash it by machine. (Washable but not waterproof) Heat setting temperature parameters for reference 1. When use the USB cable to plug in an USB port of desktop computer to get source, the output is about 5V/DC: Highest (red): the temp is 111.2/44, hot, for long time use. Medium (white): the temp is 105.8/41, warm, for long time use. Lowest (blue): the temp is 100.4/38, lukewarm, no need to use this setting. PS: if you connect it to a power bank with an output current higher than 500mA, the temp can be higher than the above measurements, and you can get more heat. 2. When use the AC adapter, the fixed output is 8.5V/DC: Highest (red): the temp is 158/70, supper hot and heats in seconds, 10 mins later you may need change to a lower heat setting. Medium (white): the temp is 131/55, very hot, 30 mins later you may need change to the lowest setting. Lowest (blue): the temp is 113/45, warm, for long time use and temp buffering. Package includes: 1 x Knee Heating Pad 1 x USB Cable (2M) 1 X US Plug(According to your order )