Panasonic FV-11-15VK1 WhisperGreenSelect 110/130/150 CFM Customizable, all in one dc motor fan, less than 0.3 sones Pick-a-flow speed selector switch 110, 130, 150 Multi- speed 0, 50-150 CFM with time delay option available by adding Plug n play module Select up to 2 additional Plug n play modules (condensation sensor, motion sensor or niteglo LED night light) Flex-z-fast bracket provides flexible, fast and easy installation- 6 inch duct adaptor Customizable, all in one DC motor fan, less than 0.3 sone Pick-A-Flow speed selector switch 110, 130, 150 Multi- Speed 0, 50-150 CFM with Time Delay option available by adding plug n play module Select up to 2 additional plug n play modules (Condensation Sensor, Motion Sensor or NiteGlo LED Night Light) Flex-Z-Fast bracket provides flexible, fast and easy installation- 6" duct adaptor