The digital temperature controller helps maintain the set temperature automatically, and the hygrometer makes monitoring humidity easy. The cooling fan distributes heat evenly inside the incubator, increasing hatching success. Package includes: Infrared heating bulb, Digital temperature controller (XH-W3001), Digital hygrometer, 12V cooling fan, 12V power adapter, B22 to E27 lamp holder, 2-pin plug, Red-black copper wire. Features: Complete set for building an incubator, Easy to connect and use, Advanced temperature control, Durable and long-lasting, Suitable for hatching eggs of chickens, ducks, quails, and other birds, Suitable for both home and commercial use.