USB Heated Lunch Box Insulation Bag Waterproof Portable Electric Heated Thermal Food Container Bags for Outdoor Picnic OfficeFeature:Keep Warm Function, Heating to About 50 Deg; automatically turn on to keep the function warm. It can provide you with hot food. Portable, so that the stomach is no longer damaged. Large capacity of the main bag. Reasonable distribution, easy to install daily Waist lights on string reduction design, daily travel without burden Specification:Name: warmable lunch box insulation bagWeight: 200g Size: 21*16*8cm/8.27*6.3*3.15in Material: waterproof Oxford clothColor: Grey Note:Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measurement deviation due to manual measurement. 1 X Lunch Box Insulated Bag1 X USB Cable