This is a warming coaster for placing warm cups, etc. You can enjoy your warm drinks while keeping them warm. Perfect for the office or home. Although it's a bit old, it's unused and in good condition. Interbase USB-powered warming coaster Size: Main unit: Approximately 12cm in diameter, 2cm in height Cord: Approximately 80cm, USB terminal power supply, non-removable Heating element: Glass The bottom switch turns on only when a cup, etc., is placed on it. Also, a lamp lights up during heating, so there's less worry about "dry burning" and it's safe. ● This is intended for keeping warm items warm and is not a cooking appliance. ● Can be used with containers that are not IH compatible. ● Please pay attention to the terminal. Charging or power supply from an outlet is not possible. ● The item will be cushioned inside the box and waterproofed for shipping. It may be sent via Rakuraku Mercari delivery. Please let me know if this is inconvenient for you. ● I have another type of this item listed. I also accept combined purchases. (Please forgive me if it's sold out.) Thank you for looking.