This intermittent aerator, installed on the wall or ceiling, allows you to occasionally renew the air inside the bathroom, WC or kitchen. It allows to act against the punctual formation of humidity or odors. Commercial reference: Silent design Product use: Against the punctual formation of humidity or odors Diameter of the duct - aerators (in mm): 100 Diameter of conduit (in mm): 100 Operation light: Yes Command type: Switch Ball bearings: Yes Width (in cm):10.4 Length(in cm): 8.8 For bathrooms: Yes For kitchen: Yes For multiple rooms: No Consumption (in W):12 In the shower or above the bathtub: No For WC: Yes For another room (laundry room, cellar, etc.): No Silent model: Yes Check valve: Yes Note: The data is all measured manually, please allow 1-120cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.Note: The data is all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.