Termometer ki vam kaže koliko stopinj imate in ima 4 barve (do 16 stopinj, 16-20 stopinj, 24-24 stopinj, čez 24 stopinj). Je za vklopit v elektriko.
http://www. gro-group.com
https://www.youtube.com/watch?v=l_2Gu-6GREU
https://www.amazon.com/Gro-Egg-Changing-Thermometer-Discontinued-Manufacturer/dp/B002B55BN8