If your kids are curious about everything, it is a good gift for them. This incubator with transparent window allows you to have clear observation of hatching process. Small in size, light in weight, it is suitable for household, laboratory or teaching use. Note: 1. Add some water to the machine before using. 2. The machine need 10-20 minutes preheating before starting to work. Please check whether the temperature is 38°C. If not, you should set the temperature to be 38°C. 3. Disconnect power supply every time before opening the lid of the machine. 4. Please add water every one or two days when working. 5. The eggs for hatching must be fertilized eggs. Specifications: Material: Plastic Color: Yellow Temperature: 18-40°C, Adjustable Voltage: AC220V Frequency: 50Hz/60Hz Power: <=30W Egg Capacity: 7 Eggs Item Size: Max.15.5 * 15.5 * 15cm / 6.10 * 6.10 * 5.91in Item Weight: 322g / 11.38oz Package Size: 16.5 * 16.5 * 15.5cm / 6.50 * 6.50 * 6.10in Package Weight: 503g / 17.77oz Package List: 1 * Egg Incubator 1 * Power Line 1 * User Manual