To have the perfect garden, you need the perfect environment. The Matador co2 controller will allow you to have the exact amount of co2 you want in the room/greenhouse. Advanced dual beam technology Measurement range: 0 - 10,000 ppm Convenient preset factory settings allows for instant usage Simple hook-up: Plug in power cord, plug-in CO2 burner Altitude, set point, and differential adjustable settings Photocell control (Can be disabled) Large 2.5" by 1.0 LCD display 6 Amp relay handles up to four CO2 burners Integral temperature compensation Easy-touch keypad on front panel This unit works with any type of co2 generator