Cordless Phones with standard 2.5mm Headset jack This Headset Connects directly to a 2.5mm headset port on most basic and business phones such as Polycom Cisco Linksys SPA, Panasonic Zultys AT&T Aastra GrandStream and many cordless DECT phones with standard 2.5mm Headset Jack.
Direct connect over the head headset is ideal for some specific Telephones with Modular 2.5mm(2rings) Headset jack Works only for phones with 2.5mm jack.

COMPATIBLE PHONE LIST: BUY ONLY IF YOU HAVE ONE OF THE PHONE MODELS IN LIST

Cisco Linksys: CIT200, CIT300, CIT310, CIT400 SPA921, SPA922, SPA941, SPA942, SPA962 Cisco SPA: 303, 501G, 502G, 504G, 508G, 509G, 525G 512G 514G,525G2 Cisco: 7985 Unified IP phones Polycom: IP320, IP321, IP330, IP331, SoundPoint Pro SE-220 SE-225 Grandstream:GXP-2010, GXP-2020, GXP-2100, GXP-2110, GXP-2120, GXP-280, GXP-285,BT200, BT201 GXP-2000(Version 1.0 higher with 2.5mm Headset Socket) Panasonic: KX-NT136, KX-NT343, KX-NT346, KX-NT366 ,KX-T7603, KX-T7625, KX-T7630, KX-T7633, KX-T7636, KX-T7730, KX-T7735 Gigaset: C610 IP, C620H Zultys Technologies: ZIP 4x4, ZIP 4x5 IP Phones Plus Many Many Cordless Phones with standard 2.5mm Headset jack from brands below:

Uniden ClearSounds EnGenius Thomson Vtech Audioline Toshiba Ameriphone Sanyo Philips Teledex Novelty Phones Aria Southwestern Bell Karcher Serene Innovations Aastra Telecom Siemens Bellsouth Vodavi Cortelco Ameritech Sharp LogicMark CLEAR SOUNDS Muraphone Midland Verizon SBC NEC IBM Motorola Coby Electronics GE Pacific Bell Sylvania Binatone Conair Lenmar RCA MCE ITT Clarity 5.8GHz 900MHz

Wantek Wired 2.5mm Headset with Noise Canceling Mic and Volume Mute Control for Polycom Cisco Linksys SPA Grandstream Panasonic Gigaset & Zultys IP Telephone and Cordless Dect Phones(510P1J25)

• Only works for some specific phones with 2.5mm standard headset Port. SEE COMPATIBLE PHONE LIST IN DESCRIPTION, BUY THE ITEM ONLY IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW. For other phones, pls contact us for Compatibility Guide or Advice.
• 2.5mm Jack Direct connect headband telephone headset headphone, No additional amplifiers or adapters required.
• Superior Call Center quality sound headset with flexible adjustable noise canceling microphone.
• Super Lightweight, Super Durable Headset with Comfortable ear and mic cushions for all day use.
• With Mic Mute / Volume Control built in. 2.5mm headset, only compatible with phones with 2.5mm headset jack.

Only works for some specific phones with 2.5mm standard headset Port. SEE COMPATIBLE PHONE LIST IN DESCRIPTION, BUY THE ITEM ONLY IF YOU HAVE ONE OF THE PHONE MODELS LISTED BELOW. For other phones, pls contact us for Compatibility Guide or Advice.Wantek