Select your NO2 device at the right upper corner of the map and click on the dot to show the current NO2 concentration
Select start time and end time of the animation loop to show the track of NO2 sensors
Click the button above when you set the NO2 sensors time range
Click the second button while you need to reset the time slider
after you set time range
Roadside Air Quality: NO2 concentration in microgram per meter cube