Bare with me, because there are a lot of pictures. I got a little camera happy! Here they are! I have tested this incubator, and I LOVE it, the temperature is rock solid. My electric thermometer registers the fluctuation at 99.0-99.8. Original Mercury thermometers! Really neat latches! Vent holes, and wafer thermostat adjustment knobs. Here is the fan, and I wired a 3-outlet extension cord into the incubator to plug in 3 Little Giant egg turners. Only one of the wafer thermostats has a wafer, but the incubator still keeps a rock solid temperature. You can see that the fan blows air towards the back, and the air blows downward, and..... ... it meets this next metal shield that directs it toward the front of the incubator. In a way the air is circulated in a circle, going from the top to the back to the bottom, to the front and back up. It still needs a little more scrubbing. The original heating element, and insulators. The two wires coming from the front are the egg turning rods. You pull these rods forward, and it turns the eggs. You may be able to see the flat piece of metal that when pulled forward, it goes underneath the eggs, and rolls the egg. (I may make a YouTube video on how these work -in action-) This front right corner of the incubator has gotten a little banged up over the years. By the way, can anyone out there tell me what this little metal rod is for, because I have tried using it as a rest for the lid, but it just doesn't seem to work?? I am really curious though.