Where have I been hiding and not noticed this fantastic little meal helper? I am a railroad worker and we are famous for having to live on fast food and junk because we have no cooking place on the engines we spend our lives on. Some people cook and warm foods on the motors themselves in the engine compartment-which, you can imagine, is a greasy mess of diesel fumes and oil- and others warm things on cab heaters that may or may not work properly and were designed as a heater for the air temperature, not for foods. This portable mini oven is designed to plug into your home 110v outlet and does work great like that. However, it also works great plugged into the 74v DC current outlet available on most locomotives. I imagine the company does not promote its use like this, but it absolutely works. Now I can take my prepared meals in plastic meal portion containers, microwave meals, etc-and easily heat them up. Bravo for a great item that stores easily and does not add weight to your bags. Easy to clean and reaches a safe temperature that doesn't melt your plastic food containers.