About this product [Unique design] This self-heating coffee cup is powered by USB 5V and features a built-in ceramic heating element in the base, enabling fast and safe heating without burning hands. When placed on the power base, the heating and insulation functions activate automatically, maintaining your beverage at an optimal temperature of approximately 60°C when used with the lid. [Best material] Constructed from high-quality 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-term heat retention. [More fashionable] Features an innovative LED lighting design with a soft, auto-changing blue glow that enhances visual appeal. The LED indicator shows heating status, allowing convenient use even in low-light conditions. A non-slip mat on the base ensures stability on desktop surfaces for added 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 charging adapter is recommended. This mug is designed primarily for keeping hot drinks warm; heating cold liquids may take considerable time. Color: Black Material: Double-layer 304 stainless steel + PC + PS Due to variations in manufacturing batches, minor differences in color or appearance of accessories may occur, but these do not affect normal functionality. Package Contents: 1 x mug, 1 x cup lid, 1 x bottom tray, 1 x USB charging cable Only the items listed above are included; other products are not part of the package. Note: Lighting conditions and display settings may cause slight variations between the product color in images and the actual item. Measurement tolerance: +/- 1-3 cm.