The Dyson Pure Cool DP04 Purifying Fan features three intelligent sensors that report air quality levels on the LCD display. This includes monitoring ultrafine particles, volatile organic compounds, and nitrogen dioxide levels. In fact, the 360º HEPA filter can capture 99.97% of allergens. As a result, this purifying fan is ideal for use around people with allergies and pets. Furthermore, the activated carbon filter removes household odors to leave the room fresh and purified. So don’t mask odors with sprays—get rid of them completely. Another standout feature is that it’s compatible with Alexa and connects to Wi-Fi. This allows you to operate the fan conveniently. Also, you can integrate the fan with the Dyson Link app to remotely control your machine and even create schedule times for the fan to operate throughout the day.