Product Name: Plug-in type heating knee brace (single) Product material: diving cloth Product color: Black 1. When USB is inserted into the USB port to obtain power, the output is about 5V/DC: Maximum (red) : The temperature is 50, high temperature, can be used for a long time; Medium (white) : temperature is 45, warm, can be used for a long time; Minimum (blue) : The temperature is 40, neither hot nor cold, can be used for a long time. PS: if it is connected to a portable power supply with an output current higher than 500mA, the temperature may be higher than the above temperature. 2. When using the adapter, the fixed output is 7.9V/DC: Maximum (red) : temperature 65, high temperature, recommended use time 10 minutes; Medium (white) : temperature 55, relatively hot, recommended use time 30 minutes; Maximum (blue) : Temperature 45, warm, can be used for a long time. Product Features: 1. Relieve knee pain related to arthritis, bursitis, strain, sprain and meniscus tear; 2, built-in mesh bag, can be put into ice pack, used for cold compress, can also be put into moxa bag, used for moxibustion; 3, adjustable and fixed in place, two fork band design, carabiners closed, can also be used for calf, thigh, arm, to relieve muscle pain and cramps; 4, 1 button control and 3 heat Settings, very easy to operate, can completely control the heating temperature and time; 5, the USB cable for portable use, can be inserted into any power supply with USB port, easy to use; 6, this knee electric heating pad is portable, easy to put in a suitcase or handbag, if you need 1 pair, please buy 2