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