Autopilot APCEM2 Desktop Hydroponic Gardening CO2 RH Temperature Monitor and Data Logger for Greenhouse or Grow Room, White/Blue, 2 Pack

• CARBON DIOXIDE METER: Autopilot APCEM2 Desktop CO2 Monitor and Data Logger Monitors carbon dioxide, relative humidity, and temperature of your grow room or greenhouse on a clear LED screen (2 Pack) MEMORY: Digital memory chart shows and records stats over an adjustable 24-hour or 7-day period. The trend chart shows variable Min/Hr/Day/Wk for readings of CO2/RH/Temperature SENSOR & ALARM: 2-channel low drift NDIR gas sensor and audible alarm for low or high CO2 levels OPERATING TEMPERATURES: Operates in temperatures 32 to 122 degrees F. Operating and storage relative humidity (RH): 0-95%, noncondensing FUNCTIONALITY: Features multiple hanging options with the hook-and-loop fastener along the back that attaches to an external battery pack (battery pack not included). Green power supply is compatible with a standard smartphone charger. Dimensions (L x W x D): 4.7 x 3.6 x 1.1 inches. Quantity: 2, Weight: 0.0 pounds, Manufacturer: Autopilot