Features:1. This item is an egg tester that can be used as a flashlight2. You need to prepare 1 AAA battery.3. Cold light to prevent overheating of eggs with an opening smaller than the diameter of the eggs.4. Apply to any egg size.5. It can help you see the contents of the eggs, and you can see if the eggs are developing properly. Incubator lamp only, other demonstration accessories in the picture are not included. Specification: Material: Stainless Steel Length: app.10.5cm/4.13in Color: As shown in the pictures Battery: 1 x AAA Battery (Not Included) Quantity: 1 PcNote: No retail package. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Content:1 x Incubator Lamp