Crystal clear conversation - incorporates a number of sound quality Features, such as digital signal processing (DSP) for greater intelligibility, and noise filtering Prevent stress and hearing injuries - reduce the number of sick days and increase employee retention. Jabra link 230 delivers acoustic shock protection. Built to withstand even the toughest work environments - to ensure long service life, Jabra link 230 is made of durable high-quality materials built to withstand even the toughest work environments.