This egg incubator holds 21 chicken eggs, 16 duck eggs, 12 goose eggs or 42 quail eggs, with adjustable tray spacing that adapts to each size. An automatic sliding tray rotates the eggs on a selected interval and stops turning 4 days before hatching, while the built-in candler allows embryo development to be checked day by day. Air vents and an automatic water refill system hold humidity steady, and the airflow system raises a temperature or humidity alert if either value drifts. The detachable tray lifts out for cleaning, and a 3.8-ft power cord reaches nearby outlets.