Egg Candler Brand new, Power by Power Supply, (not support charging) Fast Safe Extremely easy, High Lumens Egg Candler Cool light ! Long Electric Cable with American Plug, Very Durable with easy on and off button FUNTION: This candle Light will let you see the fertilized eggs by showing a dark spot and veins at the beginning, The candle light was very helpful and was really fun to watch the growth of the fertilized eggs. You can check about once or twice a week to make sure that they were still growing. The light candler tester is not just for someone who want to incubate eggs, it is also suitable for kids and students to learn the incubating process. Suitable for school funny class or shool laboratory. NOTE锛歎se the egg candler to test the egg in a dark environment, you will see the growth of the chick more clearly. High Intensity Egg Candling Lamp for monitoring egg development. This Egg Candler provides High Intensity lumens of super cool Led light for the ultra safe lumination of your eggs. Superbly made from the highest quality materials for years of use. 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. This will give you a good idea of whether or not an egg is progressing according to plan, and it will also allow you to follow the process of embryo development at first hand. Traditionally, a candle was used to scan eggs, and the process became known as candling. Obviously, complications could arise when eggs were held up to hot candles, so thanks to recent developments in technology, brighter and cooler light sources are available which do not carry the risk of harming the development of the embryos. By shining a Candling Torch through the shell, you can often make out signs of progress as and when they take place. To confirm if an eggs are fertilized or not, This Light will let you see then by showing a dark spot and veins. You just can't tell before then. you can mark your eggs with dates in pencil so that you can keep track. This light was very helpful and was really fun to watch the growth of the eggs. You can check about once or twice a week to make sure that they were still growing.Egg Candler website:http://www.janoel-incubator.com/egg-candler/