I have a portable cooling and heating refrigerator for sale. From the American company Black & Decker. Refrigerator condition: good. External appearance: good. Does the refrigerator cool: yes. Does the refrigerator heat: yes. Connection method: via car cigarette lighter or battery. Note: The cigarette lighter with the wire broke, so I made it connect directly to the battery. If you want to install a cigarette lighter, you can buy one and install it.