Rotating egg turning provides even heat during incubation, making the heating more uniform and significantly improving the hatch rate. USB plugin 5V ultralow voltage is safe, and more reliable for the elderly and children to use. It offers convenient and flexible power options: USB charger, power bank, computer host, or car USB socket. Builtin egg candling for easy inspection: a brightness LED candling light on the incubator control panel lets you check embryo development by turning the light on and off. Use candling to remove infertile eggs and underdeveloped eggs. Use scenario: home smallscale poultry incubation using common USB power sources such as a phone charger, power bank, computer host, or car USB socket. Use scenario: in a classroom or hobby group to observe incubation and embryo development, with the candling feature enabling easy progress checks. Use scenario: safe and flexible use in family settings, where 5V USB power supports simple, lowrisk operation for all ages.