This simple but professional Device are designed for egg embryo use, with this simple tool you can know the Incubation information more correctly and more easily. Equipped with cold light unit, avoid too heat to damage the eggs. Fit for usual kind of eggs like chicken egg, egg, goose egg use perfectly. Features -Color:Silver -Material:Aluminum Alloy, ABS -Size: 12.00X3.60X3.60cm;/4.72X1.41X1.41in; -Note:Battery is not included. (3 x AAA Batteries) -Professional and practical design with beautiful appearance, easy to carry and use. -The Egg uses high-penetration and high-brightness lamp beads. -After the incubator has been running for a few days, it's possible to scan the eggs with a bright light to see inside the shells. -When the lamp is , the hatching degree in the egg can be clearly seen, and the hatching degree of the egg can be easily judged. -Light egg candler is a product that checks whether the egg is fertilized and grows healthy. Package list: 1 Egg Detector