USB-Powered Hot Coaster Keeps your warm drinks at the perfect temperature Surface temperature: Approximately 75°C, warms up with a heater ◼︎Features USB-powered, can be used anywhere Simply place your cup to keep it warm Non-slip bottom for peace of mind ◼︎Compatible Cups Heat-resistant glass, metal, porcelain, and ceramic cups with a flat bottom and a diameter of 7cm or less. ※ Cups with uneven bottoms, thick cups, or cups with bumps on the bottom cannot be used. ◼︎Power USB-powered (Input: DC5V 1.5A) ◼︎Size Main body: Diameter approx. 12cm, Height 2cm, Cord length approx. 80cm Includes instruction manual. Unused item. The outer box has some folds. ※ Shipping is unavailable from December 10th to December 11th due to circumstances.