Sennheiser Corded Headsets. Headset Only: Deskmate HSC 230 Single-Ear (Cat #2011) Deskmate HSC 260 Dual-Ear (Cat #2013) (Discontinued) Versamate Convertible Corded Headset (Cat #2146) Versamate Convertible Easy Connect Bundle (Cat #2147) SC230 Telephone Headset (Cat #2114) Century SC660 TC - Telecoil Hearing Aid Optimized (Cat #2392) Phone Bundles: Deskmate for your Smartphone (Cat #2122) Deskmate Single Ear Cisco Bundle (Cat #2125) Deskmate Single Ear Easy Connect Bundle (Cat #2119) Deskmate Dual Ear Easy Connect Bundle (Cat #2118) (Discontinued) Versamate Convertible Easy Connect Bundle (Cat #2147) SC230 Easy Connect Bundle (Cat #2021) USB: Deskmate 230 Single Ear USB (Cat #2473) Deskmate USB Skype for Business Optimized (Cat #2474) Deskmate 260 Dual Ear USB (Cat #2475) (Discontinued) Deskmate Dual Ear USB Skype for Business Optimized (Cat #2476) (Discontinued) Century SC630 USB (Cat #2166)