The Blueair P2i and P2i Duo, for larger cars and RVs, adds smart sensors and Bluetooth connectivity to deliver clean air for the ride! They adjust automatically based on laser particle sensor readings to maintain air quality at all times. You can also get over-the-air updates via the Blueair Friend app on your smart device. With Cabin P2i or P2i Duo, youll never have to dread being stuck behind a bus again.