This high-quality egg tester is made of high-quality ABS material, which is insulated, stable and durable. High-intensity lights monitor egg development. LED lamp head, high power, strong light source, can clearly detect the hatching status of eggs. Fast and safe, extremely simple, and durable with easy on and off buttons that will last for years. Suitable for egg hatching, and also suitable for children and students to learn the experimental hatching process. This egg-shaped candle holder provides high-intensity LED light to provide ultra-safe lighting for your eggs, preventing them from attacking their development and causing damage. Upgraded type: Two charging methods, which can be charged directly through USB. It is also equipped with a battery box, which requires 3 AA batteries and is powered by the battery box. You can choose according to the needs of use, which is very convenient.