Cooler & Warmer for any season Convenient to Carry USB Powered; No external power source required. Fully compatible with operations, no driver required. Just plug in and enjoy! Save Energy. Brief appearance, convenient to carry One button to change cool / off / heat USB powered, no external power source required Compatible with all operations, no drive required, plug and play Compatible with version 1.1 / 2.0 Adopts high precision semicon cooling chip, 100,000 hours lift, no pollution Power consumption only 3.5W, save energy This USB cooler & warmer can keep your drink cold / warm while you are at your computer Keep your beverage chilled or warm and stay at your computer longer Just seconds after plugging in the item, the plate chills or warms to the perfect temperature or helping keep your beverage cool or warm.