... , GS, UL,EMC, TUV,ISO 4. Capacity:4L Portable electronic cooling and warming box seriesWith advanced semi-conductor refridgraton technology, the ... tea. It is very easy for use.It has both cooling and warming functions: to make cold drinks in summer, and ... : 1168 PCS40GP: 2460 PCS40HQ: 2800 PCS 4L DC 12V blue mini fridge for car /cooler & warmer/ cooling box