Professional Binaural headphone with RJ11 Plug Noise Cancelling Direct with RJ11 plug Binaural headphone with RJ11 plug Headset Key Features:1. Acoustic shock protection ... , 4620, 4621 5410, 5420 5610, 5620 DT1, DT3, DT5 Cable & Wireless: CWB 100H, CWB 200H, CWB 500, CWB 600 ... , 40TDM, 60, 60TDM, 80, 80TDM Phones ROLM Phones with EHO option Module 612, 624 SNOM Technology: 300 Spring: Protégé models ...