【Unique design】Powered by USB 5V, the cup has a built-in MCH ceramic heating element at the bottom for faster heating without burning your hands. When placed on the power base, the heating and keep-warm functions are automatically activated, keeping your drink at a perfect temperature of approximately 55℃ / 131℉ (with lid). 【Best material】Made of premium food-grade 18/8 stainless steel, this cup is smooth, sturdy, scratch-resistant, and easy to clean. The lid features a food-grade silicone sealing ring for maximum leak and dust protection. You can directly insert a straw or open the lid to drink. 【More stylish】The innovative light effect design features 7 LED indicator lights that automatically and gradually change color, providing a perfect visual experience. The LED indicator lights tell you when the water is ready, making it easy to heat coffee even in the dark. A non-slip silicone pad ensures the mug warmer stands stably on the table. 【What you get】The package includes 1 heated mug, 1 lid, 1 power base, 1 USB cable, and 1 user manual. The perfect gift for coffee lovers, say goodbye to boring old-fashioned coffee cup warmers.