PERFECT DESIGN - This candler can be used directly after charging without plugging in which is easy to carry and can be used indoors or outdoors. It gathers light better than flashlights and cell phones and can make the hatching process easy and fun. EASY TO USE - Perfect for students, home hatchers, and even the the egg candler is easy to use. You can view the eggs and compare them with the picture on the chart to determine their stage. CLEAR TO SEE - Gain precise insights into the fertility and development of each egg with our powerful egg candler. The intense light source ensures a clear view of delicate veins and movements within the egg, even allowing you to witness chicks attempting to break through the air sac. It's your window into the fascinating world of embryonic growth. VERSATILE EGG HANDING - Adapt to various egg sizes effortlessly with our egg candler's flexible attachments featuring soft rubber ends. Whether you're examining quail, duck, or chicken eggs, the gentle yet secure grip ensures a snug fit without the risk of cracking. Safeguard your eggs while enjoying the convenience of adaptability. VERSATILITY - Beyond serving the needs of home hatchers and professional hatcheries, our egg candler is an Perfect tool for educational fun in school classrooms. Power Supply:2 x AAA batteries(Not included batteries) Colour:Black Material:Plastic Package Contents: 1 * egg holder 1 * USB data cable 1 * battery box 2 * pallets Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.