1. Targeted thermotherapy: It uses carbon fiber far-infrared heating technology with a low voltage of 5V, which is safe and stable. It can quickly heat up within a few seconds, providing soothing warmth to the wrists and hands, promoting blood circulation, relieving pain, and enhancing hand flexibility. 2. Three-level temperature adjustment: It can adjust the temperature in three levels and is equipped with indicator lights, which can be controlled with one key. The green light indicates about 122°F (about 50°C), the blue light indicates about 140°F (about 60°C), and the red light indicates about 158°F (about 70°C). 3. Universal size: It has a universal size and is suitable for either the left or right hand. It is large enough to cover the palm, the back of the hand, and the wrist. Insert your thumb into the hole and then wrap the brace around your wrist. You can adjust the size with the Velcro. 4. USB power supply: The heated wrist brace is powered by a USB cable and can be easily connected to any computer, power bank, car charger, and USB adapter. It is plug-and-play. 5. Solve various wrist problems: This USB heating pad can wrap around the wrist 360 degrees, providing therapeutic hot compress. It is very suitable for patients with repetitive strain injury, carpal tunnel syndrome, and tendonitis, or people who have wrist and hand pain due to long - term work, driving, or holding a baby.