Allnice 2 in 1 Dual use USB Cup Coffee Tea Beverage Drink Cans Cooler & Warmer Heater Chilling Coasters Brief appearance, small size, convenient to carry. USB powered, no external power source required. Compatible with all operations, no drive required, plug and play. Fully compatible Versionl1.1/2.0. Adopts high precision semicon cooling chip, 100,000 hours lift, no pollution; Power consumption only 3.5W, save energy. Keep your beverage chilled or warm while you stay at your computer.