About this product [Unique design] This self-heating coffee cup is powered by USB 5V. The bottom of the cup features a built-in ceramic heating element for fast and safe heating without burning your hands. When placed on the power base, the heating and insulation functions activate automatically, maintaining your beverage at an ideal temperature of approximately 60C when used with the lid. [High-quality material] Made from premium food-grade 304 stainless steel, this heating cup is smooth, durable, scratch-resistant, and easy to clean. The lid includes a sealing ring to help prevent leaks and dust, supporting long-lasting heat retention. [Modern design] Features an elegant blue LED indicator light that glows and gradually changes, providing visual feedback. The LED indicates when the heating cycle is complete, allowing convenient use even in low-light conditions. A non-slip base ensures stability on flat surfaces for added safety and convenience. [Note] This mug heater does not include a built-in battery and must be connected to a power source to operate. A 5V-2A charger is recommended. Designed primarily for keeping hot beverages warm; heating cold liquids may take longer. Color: Black Material: Double-layer 304 stainless steel + PC + PS Due to variations in manufacturing batches, minor differences in color or accessory appearance may occur, but these do not affect functionality. Package Contents: 1 x Mug 1 x Cup lid 1 x Bottom tray 1 x USB charging cable The package includes only the items listed above. Note: Lighting effects and display settings may cause slight variations between the product color shown and the actual item. Measurement tolerance: +/- 13 cm.