1.[Easy to Operate] One button control and easy to operate. Long press the button for 3s to turn it on/off. The knee wamers has a led on the front that tells you at a glance what temperature setting you are on, There are 3 colors led display to show its temperature: red- highest(55°C/131°F-65°C/149°F), white - Medium(45℃/113°F-55℃/131°F), blue - Lowest(35℃/95°F-45℃/113°F). Please use the included DC adapter if you need a higher temp. 2.[Heated Knee Brace for Pain Relief] The knee heating pad through heat/cold therapy to provide comfortable heat therapy for your knee, promote blood circulation and effectively relieve muscle pain, knee arthritis and injury recovery. This heated knee brace is easy to use, quick to put on, quick to heat up with 5 seconds. Ideal gift choice for your parents, friends. 3.[Knee Heating Brace with a Built-in Mesh Pocket] You can add a ice bag or herb bag in the built-in bag for cold therapy if you are suffering from acute sprain and other soft tissue injury.This heated knee braces for knee pain comes with a 7.9V wall charger to ensure strong heat, plug it into the wall socket to use. Also comes with USB cable,so for use when you're watching TV or reading a book on the sofa at home. 4.[ADJUSTABLE AND FIXED] The USB electric heating knee pad wrap is 58.5cm in length, allows you to enjoy the endless comfort of heat treatment ly when you sit, stand or lay down. The knee support brace can provide you with the necessary heat and pain relieve. Three bifurcate straps design, hook and loop closure. Fits left or right Knee of most sizes. The heating pad can wrap around and be locked at knee, you needn't hold it by hand any more 5.[Multifunctional Use] The heated knee wrap is with skin-friendly super soft fabric which brings you comfortable heat therapy experience in daily use. and You can use this knee brace as an ordinary add pressure knee brace to provides ultra comfy hot therapy for knee arthritis pain relief and injury recovery, keeps knee warm. You can enjoy the toasty warm and blood circulation boost in multiple occasions, whether you are walking or driving or working in the office