Automatic mode for easy, intelligent cleaning. The laser sensor and VOC sensor detect airborne particles and volatile organic compounds such as cigar smoke and pet odors. The three-color air quality indicator provides clear visibility and helps you check the air quality around you. Automatic mode adjusts the fan speed based on real-time air quality. Clean air at the push of a button. The Wi-Fi version works with Alexa, Google Assistant, and the TCL Home app. With the TCL Home app, you can monitor air quality in real-time and adjust the fan speed from anywhere.