SPECIFICATIONS Brand Name: Crownful Certification: CE,FCC,RoHS,UL High-concerned chemical: None Origin: Mainland China Power Source: AC Crownful 4L Mini Fridge 110V 220V Beauty Makeup Skincare Refrigerator AC/DC Heated Cooling Beauty Refrigerator Car Mini Fridge Product Specification: Power Mode: Power Supply Operating Voltage: 110V (included)-130V (included) Plug Type: US Plug Battery Properties: Without Battery Box Door Structure: Single Door Working Principle: Semiconductor The Minimum Cooling Temperature: 39°F And Above NOTES: Do not change the switch from hot to cold or vice versa abruptly. Allow the unit to stay OFF for at least 30 minutes before switching the function. Do not use or store electrical appliances inside the food compartment. Prevent the fan from malfunctioning or being stuck. Avoid using towels, cloths and the like inside the machine as this could produce heat and may cause a fire. The fridge is designed to keep the items warm/hot. It is not designed to heat up cold or frozen items/foods.