100% brand new and high quality1. 5V USB interface, 1 heating element.2. 3 levels of adjustable temperature. Temperature can be adjusted.3. Washable, safe and comfortable, warm and cold.4. Mobile phone charging power included.Specifications.Name: Heating capSize: All sizesPacking list.1*heating cap1XUSB data cableAttention.1. The monitor used is not the same, the computer is not the same, the angle of photography is not the same, there may be angle colour problems.2. Pure manual measurement, there may be 0-1cm error.