1、PRACTICAL: You can see the appearance of the fertilized egg at any time, and the egg light device is very helpful for observing the growth of the fertilized egg. 2、EASY TO OPERATE: To check whether the egg hatching is normal, just place the larger end of the egg on the lamp holder, and turn on the LED light to observe. 3、PREMIUM MATERIAL: The egg candler tester is made of high quality metal and rubber material, which is sturdy and durable to ensure long term use. 4、HARMLESS: Provides a brighter and cooler light source that does not harm embryonic development, making the observation process safer. 5、MULTIPURPOSE: The egg candler tester is not only suitable for those who want to hatch eggs, but also for children and students to learn the hatching process. 1 x Egg Candler Tester1 x Lanyard1 x Egg Holder Lamp Item Type: Egg Candler TesterMaterial: Metal, RubberBattery Type and Quantity: 3 x AAA Dry Battery(Not Included)Application: Cold Light Egg CandlerApplicable Objects: Chickens, Geese, Cranes, Quails, Ducks, Pigeons