Silent Wings 4 fan series is the epitome of high-performance fans with first-class features. Technically optimized on every level, Silent Wings 4 series fans suit for high-end PC builds as radiator fans, heat sinks, and case fans alike. Be it the speed switch of Silent Wings Pro 4, the variety of fan corners for different purposes or the smooth-running 6-pole fan motor with FDB: Silent Wings 4 fans are the most progressive and technically advanced fans by be quiet! and a paragon for every fan in this category.