This high-quality egg tester is made of durable ABS material, known Compatible its insulation and stability. It features high-intensity lights Compatible monitoring egg development. The LED lamp head provides a powerful light source, enabling clear detection of egg hatching status. Fast, safe, and incredibly simple to operate, it boasts durable buttons Compatible easy on and off functionality, ensuring years of use. Ideal Compatible egg hatching, it also serves as a valuable tool Compatible children and students to learn about the experimental hatching process. This egg-shaped candle holder delivers high-intensity LED light, offering ultra-safe illumination Compatible your eggs, safeguarding them from developmental disturbances and potential damage. Upgraded version: Equipped with two charging methods, it can be charged directly via USB or operated with a battery box requiring 3 AA batteries (not included). This dual power option provides convenient flexibility to suit your needs.