[2 in 1 function] Cool to 5 and heat to 58. Your drink will cool or heat up in a few minutes [Extensive compatibility] For irregular bottle bottoms, such as mineral water bottles, we recommend that you put 2cm of water into the cup as the conductive medium when using it. Suitable for heating aluminum, iron, plastic, glass and other materials. In the conductive medium, aluminum is more conductive, followed by steel, iron, glass and plastic [Easy to use] The car cooling heating cup holder is made of ABS+environment-friendly aluminum, which is simple in design. One button cooling and one button heating make it easy to use. You can cool or heat the drink by switching modes, and then wait for it to work [Best choice] It is suitable for road travel parties, commuters, picnic coffee lovers or children to heat milk. This car coffee heater is an ideal companion for traveling or going out to work. Portable size, smaller than traditional beverage refrigerators, suitable for personal or family use [Environmentally friendly materials] The automobile cooling and heating cup holder is made of ABS+environment-friendly aluminum, which is simple in design. It is applicable to vehicle power supply and home adapter using DC-12V Specifications: Product model: R-8022 Product size: 105x95x165mm Product material: ABS, PVC Net weight: about 378g Rated voltage: DC12V