PERFECT DESIGN - This candler can be used directly after charging without plugging in, making it easy to carry and suitable for indoor or outdoor use. It gathers light more effectively than flashlights and cell phones, helping make the hatching process simple and engaging. EASY TO USE - Ideal for students, home hatchers, and beginners, the egg candler is user-friendly. You can view the eggs and compare them with the chart image to determine their developmental stage. CLEAR TO SEE - Gain accurate insights into the fertility and development of each egg with our powerful egg candler. The strong light source provides a clear view of delicate blood vessels and movements inside the egg, allowing you to observe chick development, including attempts to break through the air sac. It offers a clear window into embryonic growth. VERSATILE EGG HANDLING - Easily adapt to various egg sizes with the candler’s flexible attachments featuring soft rubber ends. Whether checking quail, duck, or chicken eggs, the gentle yet secure grip ensures a snug fit without risking damage. Protect your eggs while benefiting from versatile design. VERSATILITY - In addition to home and professional hatching, this egg candler is a great tool for educational activities in school classrooms. Power Supply: 2 x AAA batteries (batteries not included) Color: Black Material: Plastic Package Contents: 1 x Egg holder 1 x USB data cable 1 x Battery box 2 x Pallets Note: Light reflection and differences in display screens may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.