With this thorough inspection they will generate a fire extinguisher inspection report to tell you if there is any need for replacement or reinstalling it to a more appropriate place. Different extinguishers from different companies have their own time interval for inspection. It is highly recommended that you get the extinguishers checked at least once a year for annual testing and maintenance to stay sure. They will inspect the extinguisher nameplate, with the proper operating instructions. Also, the nameplate and instructions should be facing outwards.