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...

Use a higher quality headset with your iPhone or smartphone Convert two 3.5mm (1/8 inch) plugs to single Smartphone 3.5mm plug (TRRS) Works with 3.5mm jack on Apple, Android, Blackberry, Windows, or other Smartphones Reduce Electromagnetic Radiation...

Convert two 3.5mm plugs to single 4P4C RJ headset plug Works great with most VOIP phones with a RJ9/Rj10/Rj22 headset jack Save money by buying PC headsets to use with your office phone's headset jack Does not work with RJ11 jack, which is wider...

Use headset on computer and home or office phone that has a 2.5mm headset jack Convert two 3.5mm plugs to single 2.5mm plug Reduce clutter with single headset Great for traveling, carry just one headset For use on standard 2.5mm phone headset...

Convert 3.5mm Smartphone plug to single 4P4C RJ9/RJ10 handset plug. Save money by buying a smartphone headset, or using your existing one with your Aastra phone's handset jack. Reduce clutter with single headset. Does not work with RJ11 jack, which...

Female RJ9/RJ10/RJ22 to Male 2.5mm plug headset adapter Convert your RJ9 Phone Headset to 2.5mm Save money by using your existing headset! Does not work with RJ11 (which is the size of the phone jack in the wall, larger than headset phone jacks) 1...

Convert 2.5mm plug to single 4P4C RJ9/RJ10 headset plug for your VOIP phone Compatible with most IP phone headset jacks: Nortel, Avaya, Aastra, ESI, NEC, RCA, Mitel, Lucent, Shoretel, Siemens, and more... Save money by buying standard phone headsets...

Dual control with 2 mute buttons and dual volume controls Y shaped phone training splitter Listen-in only or train/take over call Works with wired or wireless headsets or a mix Use with Headset Buddy, Agent, Plantronics, Jabra, GN Netcom, and...

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...

No more reaching under or to the back of your office phone to plug in a headset Great for hot desking where headsets are switched out often Works with all direct connect headset models including Plantronics & Jabra Works with all phone models...

Use a higher quality headset with your smartphone, iPhone, or tablet Convert standard 2.5mm phone headset plug to 3.5mm TRRS plug Use your phone headset with iPhone, Android, Blackberry, PS4, iPad, or tablet headset jack Great for traveling, carry...

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...