Materials: 304 stainless steel Size: 24.5*12.3*9 Color: as shown in the picture Charging time is about 6-8 hours Heating time is about 1 hour Battery capacity is 3200*3 milliampere hours 1. Large capacity design: This electric heating insulation lunch box has a very large capacity, which can easily accommodate enough food to meet your daily needs, without having to endure the limitations of a small lunch box. 2. Double insulation: Using high-quality 304 stainless steel liner, coupled with double-layer vacuum insulation technology, can effectively maintain the temperature and humidity of the food, making your taste more delicious and appetizing. 3. USB charging: No need to worry about forgetting to bring a power cord anymore, this lunch box can be charged through the USB interface, which is very convenient and practical, allowing you to enjoy delicious food anytime, anywhere. 4. Multi-scene application: Not only suitable for students and office workers, but also suitable for other occasions that require insulation and heating, such as travel, camping, car travel, and so on. 5. Safe and convenient: Using safe and reliable heating technology, it ensures that there will be no safety hazards during the use process, and it is easy to clean and maintain, making your life more convenient. Package includes: A thermal lunch box