This ready-to-install CO2 (Carbon Dioxide) Controller is equipped with a dual channel low drift NDIR sensor 4.6-meter long cable. Simple, affordable, and your best solution for more accurate control and monitor CO2 levels in a Greenhouse, residential, hydroponics, mushroom farm, plant factory, and so on. CO2 controller/tracer Built-in Day / Night Photo-Cell sensor Chart with variable time zoom levels 2-Channel low drift NDIR sensor for more accurate CO2 reading Split-type remote sensor with 4.6-meter long cable Foolproof "Hold Home" function Ready to use no initial setup or calibration needed 3 built-in main parameters (constantly display on screen): Ambient Carbon Dioxide Set Center value Set Zone Value MAX /MIN Display (Typical test conditions, unless otherwise specified: Ambient Temp =23+/-3C, RH=50%-70%, Altitude=0~100 meter) CO2 Measurement : Measurement Range: 0~5000ppm Accuracy: Accuracy at 0~3000ppm: 50ppm or 5% of reading, whichever is greater Accuracy over 3000ppm: 7% Display Resolution: 1ppm (0-1000); 5ppm (1000-2000); 10ppm ( 2000) Response Time: Less than 2min for 63% of step change or Less than 4.6min for 90% step change Warm-up Time: Less than 30 se Power input: AC 100 ~ 240 VAC Operating Temperature: 32~122F (0~50C) Storage Temperature: -4~140F (-20~60C) Operating & Storage RH: 0~95%, non-condensing Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Plug Type: US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the , the Philippines and so on. Voltage: AC110V Colour:Photo Color Material:plastic Package Contents: 1 x CO2 Controller unit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.