Material: Made of high quality Aluminum Alloy, durable and long service life.Egg Candler: LED Light Egg Candler Tester for checking egg development, let you get first hand understanding of embryonic development process.Easy to Use: Lightweight and portable design, easy to use and carry.Battery Powered: Operated by 3x AAA batteries (not included), just turn on the switch use, bright enough but won't affect development.Application: Egg Candling Lamp is suitable for hatching eggs, but also for school students to learn the process of experimental Incubator.Specification:Material:Aluminum AlloySize Chart:10.3cmx3.7cmx3.7cm4.06inchx1.46inchx1.46inchPackage Includes:1 Egg Candler(2 Pack)Note:1. Please allow slightly error due to manual measurement.2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.3. Wish you a wonderful on line shopping!