【Not for Cell Phones and Computers】: ONLY COMPATIBLE with some Specific Phone Models from Plantronics Polycom Avaya NEC Toshiba Shoretel Mitel Allworx Zultys Nortel Aastra InterTel Siemens Digium and etc. Callez phone headset works for Polycom: SoundPoint 300 301 335 430 450 500 501 550 600 601 650 670 CX300 CX500 CX600 CX700 VVX101 VVX201 VVX301 VVX300 VVX310 VVX400 VVX410 VVX411 VVX500 VVX600 VVX1500. | CRYSTAL CLEAR CALLS: Wideband corded telephone headset offers excellent sound quality for natural listening experience, features Noise Cancelling Microphone to reduce background noise, plus Acoustic Shock Protection protects our hearing. Less noise, Clearer voice. | MOST COMFORTABLE HEADSET: Ultra lightweight RJ9 landline phone headset designed with adjustable headband fits all head sizes, a flexible boom mic suits your preference, soft and high quality leatherette ear cushion enhances all-day wearing comfort. Feel no burden during long-time work. | ULTRA DURABLE HEADSET: Precision design, quality plastics, uni-body headband construction, flexible metal mic boom make this RJ9 call center telephone headset more durable and sturdier. Compete with Plantronics or Jabra business-grade phone headset. | WARRANTY GYARANTEE: We offer 45 days money back & 24-month worry-free guarantee for our all office phone headset. Ideal for Counselling Service, Insurance, Hospital, Call Center and more. Buy the item today ONLY if you have one of phone models in list. For other phones, pls contact us for Compatibility Guide or Advice.

2.5MM JACK TELEPHONE HEADSET:【NOT for Cell Phones and Computers】This office phone headset is ONLY compatible with VTech Panasonic Dect 6.0 AT&T RCA Cisco SPA Uniden Grandstream Polycom Gigaset Clarity Zultys Cortelco landline phones and most Cordless Dect phones with standard 2.5MM headset jack. SEE MORE COMPATIBLE PHONE MODELS LIST IN DESCRIPTION. | WORK FOR MOST Panasonic DECT PHONES: The phone headset for Panasonic cordless phones KX-TGE633M, KX-TGF352N, KX-TGA470, KX-TGA652, KX-TGA660, KX-TGA931T, KX-TGA950B, KX-TGE430B, KX-TGE432, KX-TGE433B, KX-TGEA20, KX-TGEA40, KX-TG6592T, KX-NT136, KX-NT343, KX-NT346, KX-NT553, KX-T7603, KX-T7625, KX-T7630, KX-T7633, etc. ONLY works for phones with 2.5MM headset jack. Pls check the port on side or bottom view of your phone before purchase. If not sure, pls ask us for compatibility guide or advice. | ULTRA COMFORT: Super lightweight landline Panasonic phone headphone with adjustable headband to fit all head sizes, soft leatherette ear cushion enhances all-day wearing comfort. Easy to use, plug the headset directly into the 2.5mm headset jack on your phone, no additional amplifiers or adapters required. | CRYSTAL CLEAR CALLS: Business-grade Wideband 2.5mm office phone Headset with flexible adjustable Noise-Cancelling Microphone for crystal-clear conversations, Acoustic Shock Protection to protect your hearing. Perfect for Call Centers, Telephone Counseling Services, Insurance, Hospitals, Office and Home. | SUPER DURABLE: 45 days money back & 24-month worry-free guarantee. Professional Mic Mute / Volume Control built in. Precision design, quality plastics, uni-body headband construction, high quality microphone makes this call center headset for Panasonic phones sturdier and more durable.

WIDE COMPATIBILITY:【NOT for Cell Phones and Computers】 The office telephone headset is COMPATIBLE with some Landline Phones Polycom Allworx 9244 9204 9212 Mitel 5320 5324 8568 6867i ShoreTel 230 265 420 480 Avaya Aastra Nortel Toshiba etc. SEE MORE COMPATIBLE PHONE LIST IN DESCRIPTION. | WORK FOR Polycom PHONES: This RJ9 phone headset for Polycom office phones VVX411 VVX410 VVX400 VVX401 VVX500 VVX501 VVX300 VVX310 VVX311 VVX250 VVX350 VVX101 VVX201 VVX301 CX300 CX500 CX600 CX700 SoundPoint 300 301 335 430 450 500 (rev. E or later) 501 550 560 600 601 650 670. NOT for Polycom Phone SoundPoint 321, 331, 331c, Pro SE-220, SE-225. | SUPER COMFORTABLE: Super lightweight landline phone headset with adjustable headband to fit all head sizes, soft leatherette ear cushion enhances all-day wearing comfort. Easy to set up, direct connect the headset to your phone, no additional amplifiers or adapters required. | CRYSTAL CLEAR CHAT: Corded office telephone Headset with flexible adjustable Noise Cancelling Microphone to reduce background noise. Acoustic Shock Protection Circuit to protect your hearing. Less noise, Clearer voice. | 1 YEAR WARRANTY: We offer 30 days money back & 12-month worry-free guarantee. Perfect for Call Center, Telephone Counseling Services, Insurance, Hospitals, Office and Home. ONLY COMPATIBLE WITH SOME SPECIFIC PHONE MODELS LISTED IN DESCRIPTION (include but not limited). For Other Models, pls contact us for Compatibility Guide or Advice.

CISCO COMPATIBILITY:【NOT for Cell Phones and Computers】This office telephone headset is compatible with Cisco office phones 7841 7945 7821 7965 7861 7811 7942 7960 7962 7841 7940 7961 8841 8811 8845 8851 8865 6941 6945 Plantronics M12 M22. SEE MORE COMPATIBLE PHONE LIST IN DESCRIPTION. | PHONE COMPATIBILITY GUIDANCE: If your phone model is not in the description list, kindly contact us for compatibility checking before purchasing. IT IS ONLY COMPATIBLE WITH SOME SPECIFIC CISCO PHONE MODELS LISTED IN DESCRIPTION. For other models, pls contact us for Compatibility Guide or Advice. | CRYSTAL CLEAR CHAT: Corded Binaural office phone headset with flexible adjustable Noise Cancelling Microphone to reduce background noise. Acoustic Shock Protection Circuit to protect your hearing. Less noise, Clearer voice. | ULTRA COMFORTABLE: Super lightweight landline phone headset with adjustable headband to fit all head sizes, soft leatherette ear cushion enhances all-day wearing comfort. Easy to set up, direct connect the headset to your phone, no additional amplifiers or adapters required. | 1 YEAR WARRANTY: We offer 30 days money back & 12-month worry-free guarantee. This RJ9 landline phone headset for cisco phone is perfect for Call Center Service, Telephone Counseling Services, Phone sales, Insurance, Hospitals, Banks etc. Business, Office and Home.

WIDE COMPATIBILITY:【NOT for Cell Phones and Computers】 The office telephone headset is COMPATIBLE with some Landline Phones Polycom Allworx 9244 9204 9212 Mitel 5320 5324 8568 6867i ShoreTel 230 265 420 480 Avaya Aastra Nortel Toshiba etc. SEE MORE COMPATIBLE PHONE LIST IN DESCRIPTION. | WORK FOR Polycom PHONES: This RJ9 phone headset for Polycom office phones VVX411 VVX410 VVX400 VVX401 VVX500 VVX501 VVX300 VVX310 VVX311 VVX250 VVX350 VVX101 VVX201 VVX301 CX300 CX500 CX600 CX700 SoundPoint 300 301 335 430 450 500 (rev. E or later) 501 550 560 600 601 650 670. NOT for Polycom Phone SoundPoint 321, 331, 331c, Pro SE-220, SE-225. | SUPER COMFORTABLE: Super lightweight landline phone headset with adjustable headband to fit all head sizes, soft leatherette ear cushion enhances all-day wearing comfort. Easy to set up, direct connect the headset to your phone, no additional amplifiers or adapters required. | CRYSTAL CLEAR CHAT: Corded Binaural telephone Headset with flexible adjustable Noise Cancelling Microphone to reduce background noise. Acoustic Shock Protection Circuit to protect your hearing. Less noise, Clearer voice. | COMPATIBILITY GUIDE: Perfect for Call Center, Telephone Counseling Services, Insurance, Hospitals, Office and Home. ONLY COMPATIBLE WITH SOME SPECIFIC PHONE MODELS LISTED IN DESCRIPTION (include but not limited). For Other Models, pls contact us for Compatibility Guide or Advice.

【NOT for Cell Phones and Computers】COMPATIBLE with Yealink All IP Phones Avaya 1608 1616 9608G 9611G 9630 J169 J179 Grandsteam GXP 1200 1400 1615 1625 1630 2000 2140 2160 280 285 GXV 3005 3175 3240 3275 Snom 300 320 360 710 821 870 compatible with Panasonic KXT 2260 7220 7330 7420 7433 7665 7740 Zultys ZIP 33G 36G 37G 33i 35i AltiGen IP805 Aastra 6737i. SEE MORE COMPATIBLE PHONE LIST IN DESCRIPTION. | Yealink IP PHONES COMPATIBILITY: This RJ9 phone headset for Yealink office phones SIP-T19P, T20P, T21P, T22P, T23P, T26P, T27P, T28P, T30P, T31P, T33P, T40P, T41P, T23G, T27G, T29G, T31G, T32G, T33G, T38G, T40G, T41G, T42G, T46G, T48G, T49G, T41S, T42S, T46S, T48S, T42U, T43U, T46U, T48U, T53W, T54W, T57W, T55A, T56A, T58A etc. | CRYSTAL CLEAR CHAT: Corded office telephone Headset with flexible adjustable Noise Cancelling Microphone to reduce background noise. Acoustic Shock Protection Circuit to protect your hearing. Less noise, Clearer voice. | SUPER COMFORTABLE: Super lightweight landline phone headset with adjustable headband to fit all head sizes, soft leatherette ear cushion enhances all-day wearing comfort. Easy to set up, direct connect the headset to your phone, no additional amplifiers or adapters required. | 1 YEAR WARRANTY: 30 days money back & 12-month worry-free guarantee. Perfect for Call Center, Telephone Counseling Services, Insurance, Hospitals, Office and Home. ONLY COMPATIBLE WITH SOME SPECIFIC PHONE MODELS LISTED IN DESCRIPTION (include but not limited). For Other Models, pls contact us for Compatibility Guide or Advice.

【Compatibility Notices】: The compatibility of this telephone training adapter depends on whether your RJ9 headset is compatible with your telephone. As long as your headset is compatible with your telephone, the adapter will work properly. | 【Compatible Telephones】: This RJ9 phone splitter is compatible with Cisco, Yealink, Avaya, Plantronics, Polycom, ShoreTel, NEC, Aastra, Nortel, Mitel, GE and other IP phones. | 【Easy to Install】: Can plug either into handset port or RJ9 headset port. Allows the use of two headsets on one telephone, plug and play. This headset splitter will give you two more ports to headset or handset corded plug in, it helps with training and also acts as an extension cord. | 【Lightweight and Durable】: This telephone jack splitter is made of durable plastic material, the cord is 19.6 inches (50 cm) long , very lightweight and provides good sound quality. Moderate length doesn't take up much space, ideal for training. | 【Great for Training】: This is a telephone training adapter for RJ9 headset jack found on many telephones. Now both users can simultaneous listening / talking into one conversion via this adapter. Great use for call center / telephone marketing training.

WARRANTY GUARANTEE: 45 days money back & 24-month worry-free. This USB headset with microphone fits for Windows 2000/7/8/10/XP/Vista, Mac OS X and most all UC Platforms. Ideal for Call Center, Conference calls, Online courses, Classroom, Skype and more. | CLEAR CALLS: Professional wired USB Headset with DSP technology for clear conversations, the Noise-Cancelling Microphone minimizes unwanted noise while speaking. Plus Acoustic Shock Protection protects your hearing. Less noise, Clearer voice. | ULTRA COMFORT: This lightweight computer headset is designed for long time using. The adjustable headband fits all head sizes, a 330°rotating boom can be positioned for better voice capture, and breathable leather ear cushion for hours of comfort. | EASY TO USE: This headset with microphone for pc provides easy plug-and-play operation for PC or Laptop, no installation software needed. Simple in-line controls let you adjust the volume or mute calls without disruption. | DURABLE DESIGN: With quality plastics, uni-body headband construction, excellent quality metal mic boom, this computer headset with microphone is more durable and sturdier, customized for student, personal or professional use.

CRYSTAL CLEAR CALLS: Business-grade Wideband Corded USB HEADSET, Digital Signal Processing (DSP) and Noise-Cancelling Mic for crystal-clear conversations, Acoustic Shock Protection(ASP) to protect your hearing. | MOST COMFORT HEADSET: Ultra Lightweight USB headphones with adjustable headband to fit all head sizes, a flexible boom mic to suit your preference, soft and high quality ear cushion enhance all-day wearing comfort. | ULTRA DURABLE HEADSET: Precision design, Quality plastics, uni-body headband construction, flexible metal mic boom make this Dual Ear USB Skype headset with mic more durable and sturdier. Compete with Plantronics or Jabra High-grade Office Headsets. | SIMPLE AUDIO CONTROLS: Plug and Play, No Drivers needed for PC, Computer, Laptop, Mac…USB compatible devices. Convenient in-line Controls, easy to adjust this computer headset volume up/down, mute/un-mute the microphone or speaker. | 2-YEAR WARRANTY & WIDE COMPATIBILITY: 45 days money back & 24-month worry-free. Works with Windows 2000/7/8/10/XP/Vista, Mac OS X and most leading UC Platforms, Softphone. Ideal for Skype Chat, Business, Call Center, Conference calls, Dictation, Dragon speak, Online courses, Webinar presentations and more.

CRYSTAL CLEAR CALLS: Business-grade Wideband USB Headset, Digital Signal Processing (DSP) and Noise-Cancelling Mic for crystal-clear conversations, Acoustic Shock Protection(ASP) to protect your hearing. | MOST COMFORT HEADSET: Ultra lightweight USB headphones with adjustable headband to fit all head sizes, a flexible boom mic to suit your preference, soft and high quality ear cushion enhance all-day wearing comfort. | ULTRA DURABLE HEADSET: Precision design, quality plastics, uni-body headband construction, flexible metal mic boom make this Single Ear USB Skype headset with mic more durable and sturdier. Compete with Plantronics or Jabra high-grade Office Headsets. | SIMPLE AUDIO CONTROLS: Plug and Play, No drivers needed for PC, Computer, Laptop, Mac…USB compatible devices. Convenient in-line Controls, easy to adjust this computer headset volume up/down, mute/un-mute the microphone or speaker. | 2-YEAR WARRANTY & WIDE COMPATIBILITY: 45 days money back & 24-month worry-free. Works with Windows 2000/7/8/10/XP/Vista, Mac OS X and most leading UC Platforms, Softphone. Ideal for Skype Chat, Business, Call Center, Conference calls, Dictation, Dragon speak, Online courses, Webinar presentations and more.