Drayson Technologies CleanSpace Tag: The Personal Air Pollution Smart Sensor Powered by Freevolt The Tag tracks air pollution both indoors and outside, recording your exposure to harmful carbon monoxide (CO) to help avoid harmful air pollution. Completely mobile  carry it with you wherever you go You never have to plug it in or change its batteries (for the life of the device) Automatic upload of your measurements to your phone via Bluetooth Works with CleanSpace App to plan clean routes, avoid pollution hotspots and visualise trends Designed in London and Made in UK