The Dyson HushJet air purifier is designed for smaller spaces and operates quietly, even in sleep mode. It features a unique, bullet-like design with a jet engine propeller and an LED display showing air quality. Setup is simple, with no filters to assemble. The device can be controlled via buttons or a remote app, and its auto mode adjusts fan speed based on indoor particulate matter levels, which were found to be high in Noida during testing.