ThermalTrack™ keeps an accurate record of the temperature in each of your coolers and refrigerators. Connects wirelessly through your wi-fi or via cellular networks. The battery in each unit lasts about a year. When the battery is exhausted, simply discard and replace the unit. Emails or text messages can be automatically triggered when values are outside of a range you specify. All of the data is stored on our server in the cloud, with full redundancy and frequent backups. You’ll have a web interface allowing you to see the historical data from each unit, and print a PDF file for any dates you like.