Heat treatment/ Relax Stress and Pain: The heating massager has 3 adjustable heat levels that works well for relieving joints and muscles, as well as promoting blood circulation. It is especially good for people prone to joint pain in cold weather. Rechargeable Cordless Knee Massager: This massager is equipped with digital display controller and touch screen design, you can adjust the temperature and vibration mode through the display screen. The massager will automatically turn off after 30 minutes of use for safety purpose. Adjustable band: The knee heating pad comes with an extension band, which means you can use it to warm your whole body, including but not limited to your knees, shoulders, and arms. Heating pads wrap and lock around any leg or arm that needs heating without falling off. High Quality Material: This knee massager is made of high-quality diving fabric with high elasticity and softness. Lightweight knee heating pads are easy to carry around and you can use them at home or in the office. Perfect gifts for your dear family members (parents, grandparents) as their birthday gift.