The Dyson HEPA cool formaldehyde is engineered with Dyson's most advanced filtration system that combines a precise, solid-state formaldehyde sensor with a unique catalytic filter that continuously destroys formaldehyde. Powerful air multiplier technology purifies air throughout the whole room. Tested per Dyson internal test standards for whole-room air projection (TM-005021) and purification coverage (TM-003711). Third-party full machine testing based on GB/T 18801-2018 formaldehyde cumulative clean mass testing with continuous injection until the plateau of formaldehyde CADR is achieved. Results may vary in practice. Requires device to run app, wi-fi or mobile data, Bluetooth 4.0 support, and iOS version 10 or Android version 5 (or above). Standard data and messaging rates may apply. Tested per ISO 29463. The gas capture rate may vary.