Since this item is new and unused, and has been stored at home, please consider purchasing it if you understand this. I am selling this because I have no opportunity to use it. Cold weather protection item This item is recommended for staying warm and economical in the coming cold season! PCM (Temperature Regulation Function) Hot Ring Comes with a fluffy, warm cover (brown) Size: M (29-35 cm) Quantity: 2 - Uses PCM material (temperature regulation function) - No power connection or charging required - Reusable, so it's economical - Maintains a body temperature of 49°C