Convert two 3.5mm plugs to single 4P4C RJ9/RJ10 Cisco headset plug Works great with Cisco VOIP office phones with a RJ9 headset jack Save money by buying PC headsets to use with your office phone's headset jack Reduce clutter with single...

Dual control with 2 mute buttons Dual volume control Listen-in only or train/take over call Works with wired or wireless headsets or a mix Use with Agent, Plantronics, Jabra and Sennheiser headsets Works with Cisco Phones ONLY. Perfect for Call...

Convert 2.5mm plug to CISCO phone single 4P4C RJ9/RJ10 headset plug Save money by buying standard phone headsets to use with your Cisco phone headset jack Reduce clutter with single headset Does not work with RJ11 jack, which is wider than your...

Use your headset with almost any office phone - 8 settings cover most phone models Combines our PC35-RJ9A and PC35-RJ9Cisco adapters into one universal! Convert two 3.5mm plugs to single 4P4C RJ9/RJ10 headset plug. Works with mono and...

Convert 3.5mm smartphone plug to single 4P4C RJ9/RJ10 Cisco handset jack Works great with Cisco VOIP office phones with a RJ9 headset jack Save money by buying Smartphone headsets to use with your office phone's headset jack Reduce clutter with...

Use your 3.5mm headset with almost any office phone - 8 settings cover most phone models including Cisco Combines the PH35-RJ9A of the PH35-RJ9Cisco adapters! Works great with most VOIP phones with a RJ9/Rj10/Rj22 headset...

Use your headset with almost any office phone - 8 settings cover most phone models including Cisco Combines the PH25-RJ9A of the PH25-RJ9Cisco adapters! Converts 2.5mm plug to single 4P4C RJ9/RJ10 headset plug Works great with...

Dual control with 2 mute buttons Listen-in only or train/take over call Works with wired or wireless headsets or a mix Use with Headset Buddy, Plantronics, Jabra, GN Netcom and Sennheiser headsets Works with most makes of telephones with 2.5mm...