Automatic: Automatic induction heating, automatic heat preservation when the cup is put down, automatic blackout when the cup is picked up. Portable: Its size is small, and it does not to take up much space, very portable. Material: It is made of the ABS and tempered glass material, that is easy to clean. Switch: Microgravity induction switch is easy to use, safe and practical. Application: It is suitable for heating ceramic cup, glass cup, and etc. Specifications: Product name: Heating Coaster Color: Black Plug: US Power: 16W Rated voltage: 220V Material: ABS + tempered glass Application: Suitable for heating Size: As below: About 115 x 115 x 20mm/4.53 x 4.53 x 0.79 inch(L*W*H) Power cord length: About 870mm/34.25 inch Package Includes: 1Pc* Heating Coaster Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.