Crystal Clear Chat Wideband Sound office phone headset enables natural listening experience, features Noise Cancelling Microphone to reduce background noise. Every word comes through crystal clear for you and the other parties. Super Lightweight & Comfortable Lightweight RJ9 telephone headset brings no burden to your head and ear, Super soft leatherette ear cushion and 90°Rotatable Earpiece enhance all-day wearing comfort. Adjustable headband to fit all head size. Convenient In-line Controls Professional Volume Control and Mute Switch built in. Easily adjust the headset volume up/down, mute/unmute the microphone. Easy to use, just plug the headset into the RJ jack on your phone and you’re ready to talk. Friendly Notes: This headset only works for landline phones with RJ9 Jack, NOT for Smartphones and computers. (2.5mm plug, 3.5mm plug or USB plug are NOT included in the package). Do not buy the item if you can’t find your phone model in lists, pls consult us for compatibility advice. Compatible Phone List (Include but not limited): ShoreTel: IP100 IP212 212K IP230 IP265 IP530 IP560 560G IP565 IP565G IP655 420 480 480G 485Plantronics: A100 S10 S11 S12 S50 T10 T20 T50 T100 T110 SP-02 SP-04 SP-05 A100 T50 T100 PLX-400 PLX-500Polycom: SoundPoint 300 301 335 430 450 500 (rev. E or later) 501 550 600 601 650 670 CX300 CX500 CX600 CX700 VVX300 VVX310 VVX400 VVX410 VVX500 VVX600 VVX1500 Zultys: ZIP 59i 55i 53iPacket8: 6753i 6755i 6757iToshiba: DKT-3001 DKT-3010S DKT-3014SDL DKT-3020S DKT-3020SD( NEED ‘BHEU ADAPTER’ sold by Toshiba not available from us) Strata CIX DP5022F-SD DP5023-SD DP5018-S DP5000-Series NEC: Aspire Electra Elite IPK Dterm Series i DSX DTL DTP DTR DTU SERIES DT300 DT310 DT330 DT700 DT730 DT750 Dterm Series E DTU-8 DTU-8D DTU-16 DTU-16D DTU-32 DTU-32D DTP-8 DTP-8D DTP-16 DTP-16D DTP-32 DTP-32D DTH-8 DTH-8D DTH-16 DTH-16D DTH-32 DTH-32D Northern Telecom (Nortel Norstar): 1120E IP 1140E IP 1150E IP i2002 (ip2002) i2004 (ip2004 (not for i2400 phase II and i2004 POE ) 1210 1220 1230 2465 2564 NTZK23AA AB: (M2216):ACDI Vista Powertouch 480 480e 480i M2008 M2216 M2616 M3903 M3904 M3905 M7208 T7208 M7308 M7310 M7316 T7316 T7316E M7324 M7900 M8001 M8003 M9516 M9009 NT8B20 NT8B30 NT8B40 NT8B50 Meridian Option M3110 3310 3820 Siemens or ROLM: Optiset E Series with CA or HA option modules Optiset E Advance Optiset Advance Plus+ Headset Adapter Comfort 300E+ Headset Adapter Comfort F300E Optipoint 410 Standard & Advance Optipoint 420 Standard & Advance Optipoint 500 Basic Standard Standard SL & Advance& office Optipoint 600 Optipoint 600 Office OpenStage 4040TDM 6060TDM 8080TDM