A electric lunch box is used to heat and keep food warm without a microwave by plugging into a wall outlet or a car 12v socket. This is convenient for people who works in a office , school, or road trips, it allows them to have a hot lunch anywhere. Saving them from cold meals or waiting for a crowded microwave. It will also help u to avoids buying lunches out, it will help u to save money too, and often allowing for healthier meal choice