Smart Dust Sensor: Detects the pollution status of the air indoor in real time and adjusts fan speed accordingly | | For Small to Mid-Sized Spaces: Ideal for a personal desk, bedroom, home office, bathroom, and more, covering up to 456 square feet | | 3 Color LED Display: Detects cleanliness of indoor air through the dust sensor and displays on screen | | Sleep Mode: Enjoy a good nights rest as sleep mode is designed slow down the fan speed and dim the lights for a calm and quiet ambiance | | Included Accessories: Comes with 2 True HEPA H13 filters and product manual | |