All incubators maintain temperature, humidity, and egg rotation to ensure chicks develop and hatch. Most have a thermostat to sustain temperature, and a few use timers to simulate natural cool periods.
Egg rotation happens in one of several ways. Manual incubators need users to move the eggs periodically. Those with semi-automatic rotators only need a trigger, while fully automatic models manage the entire process. A good incubator saves time, creates the ideal environment, and increases the likelihood of successful hatching.