A friend of mine sells us fresh eggs, so when I saw this tester, I thought that this would be a perfect 'trade off' for a dozen. It's like an electric flashlight that has two different sized adapters for eggs that are from other breeds of laying hens. It's easy to operate and the LED lights up the inside of the egg to check for fertilization. Now, the eggs we used were very freshly laid and I'm not sure if it would show whether or not they had started to grow an embryo. We didn't see any blood spots or noticed anything out of the ordinary. I guess they have great chickens but the rooster must not be able to shoot straight!
I received this product at a promotional discount in exchange for my honest and unbiased review.
Bright Cool LED Light Egg Candler Tester - Incubator Warehouse Exclusive---Wendsim