The Envirovent Infinity Filterless WC Bathroom & Kitchen Extractor Fan 12V INF-SELV+ is a modern and energy-efficient extractor fan designed for use in bathrooms and kitchens. With a timerless control style and switch operation, this circular vent style fan features a 4-inch diameter and is made of durable plastic material. Wall-mounted and operated at 12V, this extractor fan from the reputable brand Envirovent is a reliable addition to any home, providing excellent ventilation and air quality improvement in the kitchen and bathroom areas.