LCD size: 128 x 82 mm

CO² measuring range: 400 ~ 5000 PPM

CO² level indicator: good (400~700 PPM) / normal (700~1000 PPM) / poor (1000~5000 PPM)

CO² monitoring alert

Temperature range: -9.9°C - 50°C

Humidity range: 20% ~ 95%

Max/min record of CO², temperature & humidity value

Time and calendar display, time alarm function

Power supply: 5V1A adaptor or 3 x AA batteries

Data below for your reference:

400~600ppm background (normal) outdoor air level.

600~1,000ppm Typical level for footprint with good air exchange.

1,000~1,500ppm Start room ventilation.

1,500~2,000ppm Levels associated with drowsiness and complaints of poor air. Ventilation is recommended!

2,000~5,000ppm Levels associated with headaches, lethargy and stagnant, stale, stuffy air. Difficulty concentrating, difficulty concentrating, increased heart rate, and mild nausea may also occur.

Ventilation is highly recommended!

>5,000ppm exposure may cause severe hypoxia, resulting in permanent brain damage, coma and death.

Immediate ventilation is required!