This is a CO2 measuring device that measures the CO2 in a space relatively and, when the CO2 concentration exceeds the standard value + threshold, will notify you of the timing to ventilate via an LED signal.
To turn the power on and off, simply plug the AC adapter into a power outlet.
Turn the power on and the device will automatically measure the reference value in the space for 20 minutes.
The threshold can be set. Size (mm): 72 x 30 x 230
Weight(kg):0.12
2m cord (USB-C type) included
