2 X Polaris U10P Cords for Plantronics QD Compatible headsets - Direct connect cords Plantronics compatible QD on one end, RJ9/11 on the other Polaris U10P cord for direct connection to some telephones, ie.e..Polycom,Nortel,Allworx,NEC Can use on any PLT QD compatible headset for polaris connection Contact Headset World USA with any questions regarding compatibility