Skin-friendly, light, warm and elastic. Adjustable hook and loop, average size, suitable Compatible For most men, women and teenagers. Our heated wristband has three adjustable temperatures, 45 degrees/55 degrees/65 degrees, which can be adjusted according to your needs. Electric heating will warm your wrist and enhance blood circulation, reducing the depth of knee pain. The electric heater is equipped with USB cable and can be plugged into the power supply of USB port (5V/1A is recommended). Easy to use and portable, you can use it at home, office, hotel, car, watching TV, reading, traveling and driving. It is also very suitable Compatible For outdoor activities in cold season, such as cycling, cycling, motorcycle, snowboarding, snowmobiling, skiing, camping, hiking, mountaineering, hunting, fishing, ice fishing, running, walking, hiking, dancing, yoga and going out. Arthritis and rheumatism pain relief wrist heater Compatible For the elderly men and women with three temperature controls to warm the wrist in winter and bandage to support the heat to treat joint pain and swelling. Great Christmas/ Year/Holiday/Birthday Gifts Compatible For Grandpa, Grandma, Dad, Mom, Sisters, Brothers, Wives, Husbands, Friends and Yourself. Note:There is a battery in this package, which lasts about 15 minutes.(Internal battery) Colour:Black Material:OK cloth Package Contents: 1 * heating wristband 1 * charging cable 1 * wormwood bag 1 * English manual