7.5 x 3.1 x 1.4 inches Showing the single result Sort by popularity Sort by average rating Sort by latest Sort by price: low to high Sort by price: high to low Sort by editor review Added to wishlistRemoved from wishlist 0 Add to compare AirKnight 9-in-1 Indoor Air Quality Monitor, Portable CO2 Monitor | VOC Sensor | Formaldehyde Detector AQI PM2.5 + 4 More Home Monitoring | Air Quality Tester for Confined Space Added to wishlistRemoved from wishlist 0 Add to compare $134.99