Specifications: Brief appearance, convenient to carryOne button to change cool / off / heatUSB powered, no external power source requiredCompatible with all operations, no drive required, plug and playCompatible with version 1.1 / 2.0Adopts high precision semicon cooling chip, 100,000 hours lift, no pollutionPower consumption only 3.5W, save energyThis USB cooler & warmer can keep your drink cold / warm while you are at your computerKeep your beverage chilled or warm and stay at your computer longerJust seconds after plugging in the item, the plate chills or warms to the perfect temperature or helping keep your beverage cool or warmDescription:Supply Voltage: USB + 5VElectric Current: 1.5AWork Environment Temperature: -20 Celsius degrees to 45 Celsius degreesHighest Temperature on Metal Plate Surface: 56.4 Celsius, difference 5%Lowest Temperature on Metal Plate Surface: 16 Celsius, difference 5% ( 25 Celsius degree test environment temperature ) Color: WhiteMaterial: ABSSize ( L x W x H ): Approx. 5.4 x 3.4 x 1.4 inch ( 13.7 x 8.6 x 3.6 cm ) Max Cup Diameter: Approx. 2.5 inch / 6.4 cmPackage Includes:1 x Beverage cooler & warmer