Features:

   Fast-heating electric knee pad: heats in seconds, provides ultra comfy hot therapy for knee arthritis pain relief and injury recovery, keeps knee warm, can also be used on calfs, thighs, arms to relieve muscle soreness and cramps. Supper comfortable for use.

1 button control and 3 heat-settings: very easy to operate, you can control the heating temp and time totally by yourself. The power button with LED indicator, it can be operated to red-highest, white-medium, blue-lowest temp setting. Short press the button for once can change to another heat setting.

Adjustable and stay in place: two bifurcate straps design, hook and loop closure, the heating pad can wrap around and be locked at any leg or arm positions where you need heat compress, you needn't hold it by hand any more. With a built-in mash bag, put a ice bag in, you can use it for cold therapy if need be.

Comes with 1 USB cord: the USB cord is for portable use, it can be pluged in any power supplies with usb port, such as power bank, PC, laptop, desktop computer, car charger.

Travel size and long power cord: this knee electrical heating pad is portable, easy to put it in your suitcase or handbag.The power cord is about 6.6 feet (2 meters) long enough to allow you move freely when connect it to a socket. Fits a leg or arm circumference less than 21inch.

     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.

     Specifications:

   Material: Breathable Neoprene Material

3 heat-settings: red-highest, white-medium, blue-lowest 

Size: 59*21.8 cm

     Without Plug Package included:

   1 x Knee brace support

1 x USB cable

     with plug Package included:

   1 x Knee brace support

1 x USB cable

1*EU/US PLUG OR No Plug (Optional)