1、[LED Cold Light Source] Egg candler uses high end LED cold light source, which is very helpful for observing the growth of fertilized eggs. It can be checked 1‑2 times a week to ensure that the fertilized eggs are still growing. 2、[Easy Operation] Egg candler is very simple to use, just press the button at the bottom of the egg tube, and the plastic cover can put the egg on it conveniently. 3、[Aluminum Alloy Material] The egg lamp shell is made of high quality aluminum alloy material, which is sturdy and durable with fine workmanship. 4、[Observation of Growth] Egg light is a product to check whether the egg is fertilized and grow healthily, to help you observe and ensure the normal growth of the fertilized egg. 5、[Widely Used] The light candle tester is not only suitable for people who want to breeding eggs, but also suitable for children and students to learn the hatching process. Suitable for school fun classroom or school laboratory. 3 x Egg Candler (Battery Not Included)3 x Cover3 x Lanyard Item Type: Egg CandlerMaterial: Aluminium AlloyWeight: Approx. 165g / 5.8ozProduct Assembly Size: Approx. 10 x 3.3cm / 3.9 x 1.3inBattery: 3 x AAA (Battery Not Included)Lamp Beads: 9Purpose: Very Suitable for Hatching Chicken, Duck or Goose Eggs, Etc.