Oregon Scientific WS907G Gaiam Air Sanitizer Nullify Imported Nano-material reduces odors, dust and airborne bacteria efficiently. No harmful emissions of chemicals and particles into the air. Volatile organic compound (voc) air quality sensor with air quality improvement level display on a scale of 1 (best) to 20 (worst) located on top. LED air quality detector with light sensing function that adjusts the lighting according to the environment. Fan with auto/hi/lo intensity draws in airborne particles and accelerates the air sanitizing process.