Poly M15D Cable (3M)M15D Cable (3M) Crystal clear conversation Poly DA Series digital adapters keep call center employees sounding crystal clear from home or in the office. With easy USB A or USB Type C connections, they adjust audio to each specific Poly headset, offering quality calls [1]. Features Product type Cable Brand compatibility POLY Compatibility EncorePro 500 seriesEncorePro 700 series Product colour Black Packaging data Package width 190 mm Package depth 210