[Battery drain prevention function] It automatically measures the voltage of the car, and if the car battery is weak, it will automatically turn off, so it does not happen that the battery has gone up. It is also possible to configure the battery protection function. [One unit can be used for freezing and refrigeration] Since it is an independent two-layer type, you can use the freezer compartment and the refrigerator compartment separately with one unit! Depending on the usage scene, you can choose from three patterns: "refrigeration & freezing", "refrigeration & refrigeration", and "freezing & freezing". The temperature can be adjusted from -20°C to 10°C in 1°C increments, so fine adjustment is possible. [Large capacity 40L] The 40L type holds 33 500ml PET bottles. [Easy movement] It has casters and a telescopic handle lever, so it's easy to move! It's okay on uneven roads! [Power supply that can be used anywhere] It's easy to get power from anywhere, so you don't have to choose where you want to use it! Household outlet (AC), in-vehicle cigar socket (DC12V/24V), commercially available portable battery