The FM100 is an indoor compact formaldehyde monitor with a tilting leg stand. Alternately displays Formaldehyde concentration, Air Temperature, and Relative Humidity readings which cycles approximately every 6 seconds. The FM100 features both audible and visual alarms, “ZERO” Re-Calibration function, Manual Temperature and Relative Humidity Compensation (adjustable), CH2O Calibration function in fresh air and a low battery indicator. Product is CE certified and has a year warranty. Complete with universal AC adaptor (including US, EU, UK, and AU plugs), user’s manual and 4 AAA batteries.