This is a HARCOTY incubator with an automatic egg-turning function. It can incubate up to 24 chicken eggs. I have used it twice. I hatched many chicks with it. The hatched chicks spent a few hours inside the incubator, so there may be some traces, but I have cleaned it. There were some eggs that didn't hatch, but they were all unfertilized eggs, and there were no dead-in-shell or stopped-development eggs. I have used it carefully, so there are no functional problems. There are no missing parts.