In order to meet the special demands of fast-growing contact centers and offices, ADDASOUND's premium and innovative Crystal 2871/2872 have arrived. The headsets are specially designed for professional users in call centers and offices who would like to have the best hands-free device while experiencing superior noise-canceling, crystal clear voice transmission, all-day comfort and great durability. ADDASOUND will be an ideal choice and will deliver the best hands-free experience.