Overview: Product:USB cooler amp; warmer instruction Cooler amp; warmer for seasons Brief appearance, convenient to carry Durable ABS plastic USB powered, no external power source required Fully compatible with all operations, plug & play This item adopts high precision sinmicon cooling chip, 100000 hours life, no pollution Power consumption only 3.5W, save energy Supply voltage: 5 V Electric current:1.5 A Work environment