CRIMMY heating pad is made of soft and comfortable plush fabric, safe and non-toxic, with a smooth surface and fine stitches. It can be heated in 3 seconds, and the temperature can be maintained for 1 hour. It has multiple uses: back waist warm in winter, suitable for all seasons. The portable electric heating pad can be used for muscle stiffness, abdominal pain, back pain, menstrual cramps, and joint pain caused by arthritis, physical labor, sports injuries, and more. It is very suitable for people who sit in front of the computer for a long time, drivers, and office workers. It can be used with any USB power supply device, such as a laptop, mobile power bank, USB charger, etc. It is very suitable for use in the office, car, and home. It can be used as a warm gift for family and friends. This is a mini-sized plush electric heating pad, which is smaller than other products on the market. Please confirm the size before purchasing.