TriProC 3-in-1 Hands-Free DC 2.5mm Monaural Telephone Headset for Landline Phones,with Volume Adjuster, 3 Kinds of Wear Mode,Compatible for Jabra Cisco Polycom Panasonic

Brisk Links Headset for Cordless Phones Corded Headset 2.5mm Hands Free Headset

TRIPROC 3-in-1 Monaural 4 Pin RJ9 Telephone Headset for Landline Phones

Plantronics M220C Mobile Headset for Cordless Phones

Jabra EarWave Corded Headset - Compatible with 3.5mm and 2.5mm Phones

Audicom IP Headset Adapter for 2.5mm Headset, RJ9/RJ10/RJ22 Headset Plug Adapter Converter for Aastra Adtran BT Alcatel Lucent Avaya Interquartz Lazerbuilt Ascom Telephone Phones (H25-STAB)

2.5mm Female to 3.5mm Male 4 Poles Jack Stereo Headset Adapter (Supports Both Microphone/Mic and Headphone Functions)

Jabra EarWave Corded Headset - Compatible with 3.5mm and 2.5mm Phones - Special Color Edition

Plantronics 81083-01 Replacement Headset for CT14

Panasonic KX-TCA60 Hands-Free Headset with Comfort Fit Headband for Use with Cordless Phones