This sensor allows you to measure the level of CO2 in a living or working room, such as a room in a nursing home, a classroom in a school, a doctor's surgery, etc. When the maximum level is reached (alarm and different coloured pictogram), it is time to ventilate. Temperature and humidity display. Backlighting. NDIR sensor. Dimensions: 8 x 8 x 2,5 cm. Weight 110 gr. Adapter supplied, rechargeable. 2 years warranty.