Generation 1: 1. Fast cooling and heating, cooling up to 0 degrees Celsius, heating up to 60 degrees Celsius, constant temperature of about 40-60 degrees Celsius 2. Aluminum alloy digital screen button, easy to operate and more beautiful 3. On the large and small cup holder design, suitable for different sizes of car cups, more convenient to take 4. Concentrated wind power, cooling and heating efficiency faster 5. Can be placed in canned beverages, small diameter mineral water bottles, baby bottles 6. Hidden power supply, neat and beautiful 7. Voltage: DC 12V 8. Power: 36W 9. Weight: about 500g 10. Size: about 30 x 13.4 x 9.4cm Generation 3: 1. Fast cooling and heating, cooling up to 0 degrees Celsius, heating up to 60 degrees Celsius, constant temperature of about 40-60 degrees Celsius 2. Synchronous gear retractable bracket structure design, suitable for different size models cup holder fixed, easy to install 3. Digital screen and switch button integration, hot and cold one key switch, simple and clear display 4. Mechanical switch keys, simple and reliable operation 5. Minimalist appearance design, metal gray baking paint on the surface 6. Small and portable, can be removed from the car bracket on the desk, low noise operation, does not occupy space 7. Separate structure design, easy to clean 8. Material: ABS, aviation aluminum 9. Voltage: DC 12V 10. Power: 36W 11. Weight: about 650g 12. Size: about 17.2 x 13.6 x 9cm