【NOT Work with Smartphone and Computer】See Compatible Phone List in Description. ONLY BUY the item if you have one of phone models in the list. Direct connect landline telephone headsets, Compatible with Some Specific Phone Models from ShoreTel Zultys Toshiba NEC Aspire Dterm Nortel Norstar Meridian Siemens ROLM Packet8. Compatible with Plantronics S12... Polycom 300 301 335 430 450 500 501 550 560 600 601 650 670 CX300 CX500 CX600 CX700 VVX300 VVX310 VVX311 VVX330 VVX400 VVX410 VVX411 VVX500... Comfortable Wearing: Monaural RJ9 deskphone headset with soft leatherette ear cushions guarantees a perfect fit. Lightweight office telephone headset equipped with adjustable headband for all-day wearing comfort. Clear Calls: Hands-free RJ9 Office phone headset with Noise-canceling microphone to reduce background noise. Wideband audio delivers clearer conversations, while Acoustic Shock Protection Circuit protects from listening fatigue and loss. Extremely Durability：Ergonomically designed call center phone headset made with high impact plastic to continuous use, and equipped with flexible microphone boom ensure more guaranteed life span. Volume control and mute button built-in. ONLY COMPATIBLE WITH SOME SPECIFIC PHONE MODELS LISTED IN DESCRIPTION. Buy the item today if you have one of phone models in list. For other phones, please contact us for Compatibility Guide. FRIENDLY NOTES: This headset only works for landline phones with RJ9 Headset Jack, NOT for Smartphones and computers. 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): Zultys: ZIP 59i 55i 53i Packet8: 6753i 6755i ShoreTel: IP100 IP212 212K IP230 IP265 IP530 IP560 560G IP565 IP565G IP655 420 480 480G 485 Plantronics: A100 S10 S11 S12 S50 T10 T20 T50 T100 T110 SP-02 SP-04 SP-05 A100 T50 T100 PLX-400 PLX-500 Polycom: SoundPoint 300 301 335 430 450 500 (rev. E or later) 501 550 600 601 650 670 CX300 CX500 CX600 CX700 VVX101 VVX150 VVX201 VVX250 VVX300 VVX310 VVX400 VVX410 VVX450 VVX500 VVX600 VVX650 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 AVAYA /Lucent: 1120 1140 1165 1210 1220 1230 1408 1416 2410 2420 4406D+ 4412D+ 4424D+ 4424LD+ 4610 4610SW 4612 4620 4620SW 4621 4621SW 4622 4622SW 4625 4625W 4630 4630SW 5410 5420 5610 5620 5621 5625 6402D 6408D+ 6416D+M 6424D+M 8403 8410D 8434DX 9404 9406 9408 9504 9508 DT1 DT3 DT5 QE4610 Aastra: 2465 2564 480 480e 480i 51i 53i 55i 57i 57iCT 554 564 565 i733 1120e 1140e 1150e 1210 1220 1230 i2002 i2004 i2004 IP i2004 Phase II i2052 7406 8540 9617 6730i 6731i 6739i 6751i 6753i 6755i 6757i 6757i CT 7446i 9112i 9133i 9116 9143i 9480i M2216 (ACD I or ACD II) M3905 M4000 M4020 M7208 M7308 M7310 M7316 M7324 M4000 M4020 M5208 M5209 M5216 M5317 M7900 M8001 M8003 M9009 M9516 Powertouch 480 480e 480i Telephones i2002 i2004 i2004 IP (not compatible with i2400 phase II and i2004 POE phones) Dialog 4222 4223 4224 4225 Toshiba: DKT-3001 DKT-3010S DKT-3014SDL DKT-3020S DKT-3020SD( NEED ‘BHEU ADAPTER’ supplied by Toshiba not available from us) Strata CIX DP5022F-SD DP5023-SD DP5018-S DP5000-Series 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 Phones ROLM Phones with EHO option Module 612624