| When you re cooking an egg in its shell it s hard to know what s really going on in there. Timers help but are not foolproof. This patented device sits in the pan and takes into account the number of eggs the amount of water even the altitude as it senses accumulation of heat. Don t suffer the disappointment of green yolks or runny yolks next time you go to make egg salad!Graduated scale indicates soft medium or hard boiled by changing color 1 1/2" W x 2 1/4" L x 1 1/4" H |