Probador de calidad del aire 5 en 1 CO2 TVOC HCHO temperatura humedad prueba pantalla digital↑
Clear Indication: This tester features CO2 concentration level indications. It flashes green at 0 to 799ppm, yellow at 800 to 1199ppm, orange at 1200 to 1599ppm, red at 1600 to 1999ppm, and 4 colors flashing at 1999ppm.