Poly Spare Cable Assembly U10 is a heavy-duty connection cord designed to connect Poly and Plantronics H-Series headsets directly to compatible desk phones and audio amplifiers. Featuring a coiled design for flexible reach, this headset adapter cable delivers clear audio transmission and easy plug-and-play setup for busy call center and office environments. FeaturesConnects H-Series Quick Disconnect (QD) headsets to RJ9 desk phone ports Coiled cable design provides flexible reach and keeps desk clutter-free Compatible with Cisco IP phones and Poly audio processors/amplifiers Direct-connect connection requires no additional external power supply Durable construction built for high-volume daily enterprise call use