The Element 3 by LTL Controls is a highly advanced, yet easy to use controller for maintaining temperature, humidity, and CO2 within the growing area. The Element 3 features a super accurate remote sensor consisting of a series of precision sensors that monitor temperature, humidity, CO2, and light. The controller is designed to resist EMI/EFI from electronic/digital ballasts, features a superiorly engineered circuit board, heavy-duty internal construction, and high-quality UL/CE listed components to ensure years of operation. The Element 3 also has the unique ability to be connected to a Windows based PC (cord and adapter sold separately), giving you the option to manage and track settings on your computer! The Element 3 has outputs to control 1 cooling device, 1 heating device, 1 humidifier OR dehumidifier, and 1 CO2 device. The advanced technology of the Element 3 allows you to customize the settings based on the specific devices you are using within your growing area to maximize efficiency and create the most ideal environment for your plants. Used to Control: - 1 Cooling Device (fan, AC) - 1 Heating Device - 1 Humidifier OR Dehumidifer - 1 CO2 Device (complete PPM regulation)