Voistek A2PQD25MM Quick Disconnect QD to 2.5mm Telephone Headset Adapter Cable Coiled for Plantronics Headset to Cisco Linksys SPA Polycom Grandstream Panasonic Zultys & Gigaset Office IP & Many Cordless Dect Phones with sthandard 2.5mm Headset Jack See Compatible Phone List in Description, DO NOT BUY IF YOU CAN NOT FIND YOUR PHONE MODEL IN LIST, Just get FREE HEADSET EXPERT HELP or ADVICE by CONTACTING US. Works with Plantronics H/HW series. VXI P series, Smith Corona P Series, Starkey PL Series, The One Headsets. Quick Disconnect allows you to disconnect from your headset without losing your call. This cable works with the following Plantronics headsets: Starset H31 H31N Mirage H41 H41N Supra H51 H51N H61 H61N TriStar H81 H81N Encore H91 H91N H101 H101N FreeHand H131N DuoSet H141 H141N DuoPro H151 H151N H161 H161N H171 H171N H181 H181N and SupraPlus H251 H251N H261 H261N etc. No Headset included in Package