US Cable25 Ft Long Black Receiver Spiral Curly Coil Handset Phone Cord For 4 conductor using RJ9 modular connectors This cord works on nearly any phone made in the last 25+ years. Nearly all modern phones are 4 conductor using RJ9 modular snap in connectors. Do not use it between the phone and the wall jack. 25ft COILED Cable RJ10 RJ11 4P4C- RJ10 4P4C Cable Assembly Type Telephone Cables Connector Type A RJ11 RJ10 Plug 4P4C Handset Cord Connector Connector Type B RJ10RJ11 Plug Handset Cord 40 of Coiled Telephone Handset RJ10 Cable Lead Black