Removes over 99% of all particles such as Pollen, Smoke, Dust, Dander, Outdoor Pollution, and Odors Filters the air in rooms up to a size of 1,345 ft² Purifies the air with an output (Smoke CADR) of 177 Cubic Feet per Minute (CFM) Features smart sensors, an automatic mode, and an LED light ring to indicate the air quality Includes a 3-in-1 filter (pre-filter, activated carbon filter, uses HEPA layer) for excellent air purification Quiet Mode: The Bosch Air series will reduce noise to a whisper and turn off all lights – leaving nothing to distract you from a good night’s sleep Child Lock: Once the unit is powered on, simply press and hold the power button for 3 seconds to enable the child lock feature