Showlu USB Electric Heating Lunch Bag | Waterproof Oxford Food WarmerSPECIFICATIONS Brand Name: NoEnName_Null Origin: Mainland China Feature: Thermal Insulation Bullet Points: 1Convenient to Use: Just plug in the power and wait for heating, easy to operate. This electric lunch bag heater can heat food up to 40 50 degrees and then automatically switches to keep warm. 2Usage & Precautions: 1. Put the hot food into the bento box, then put the bento box into the thermal insulation bag, plug it in, and take it out when