Welcome to our store! Product Description: - USB Powered: This coffee mug warmer is powered by USB and supports multiple power supply methods, including power banks, computers, and charging heads. - Universal For Various Cups: It is compatible with most cups, such as glass, stainless steel, and ceramic cups. For optimal results, using a lid over the mug will help retain heat. - Cooling and Heating: This dual-use mug warmer can both heat and cool beverages. It can also be used for water cooling in the summer. Simple operation with one button to switch functions. - Rapid Heat Dissipation: The coffee warmer is designed with large exhaust holes for quick heat dissipation, prolonging its service life for all-day use without pressure. - For Winter: Keep beverages like coffee, tea, and milk warm throughout the day, making it a great gift for loved ones on Valentine's Day, Thanksgiving, and Christmas. Specifications: - Item Type: Coffee Warmer - Material: ABS - Weight: Approx. 441g/15.56oz - Power Supply: USB power supply - Input Voltage: 5V - Cooling Power: 10-18W - Heating Power: 10-18W - Maximum Temperature: 65℃ Package Includes: - 1 x Coffee Warmer - 1 x USB Cable - 1 x Instruction 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.