The Vent-Axia 498095 NBR dMEV C100 is a round, white, timerless extractor fan with a 4-inch diameter. It is designed for continuous ventilation, featuring a glossy finish and made of plastic. This fan operates on 230V with a single speed, controlling its operation with a switch. It has a programmable timer, energy efficiency rating of A, and is manufactured in the United Kingdom. Ideal for improving air quality and circulation in homes or buildings, this brand makes a reliable choice for efficient ventilation systems.