DPA 4288 CORE+ Directional Flex Earset Mic4288 Directional Flex Headsets and Earsets Combining the legendary sound of the 4088 Directional Capsule with the lightweight single earset system, the 4288 is ideal for both spoken word and vocal performance applications. It offers accurate and natural voice intelligibility and very high SPL capabilities users can both speak and sing into the mic with no hint of distortion.