2.5MM TELEPHONE HEADSET: This telephone headset ONLY fit AT&T Panasonic Vtech Cisco SPA Grandstream Polycom Gigaset Uniden Clarity home office landline phones and most Dect 6.0 cordless Phones with standard 2.5MM HEADSET JACK. DON’T BUY IT FOR CELL PHONES & COMPUTERS. For other phones, please feel free to consult us for compatibility guide and advice. | COMPATIBLE MODELS: ONLY COMPATIBLE WITH SOME SPECIFIC PHONE MODELS LISTED IN DESCRIPTION. Some specific models from AT&T: TL88002, TL86103, TL86003, TL76108, T L7610, TL88102, TL86109, TL86009, CL82550, CL82500, CL8230, CL82309, CL82350, CL80109, ML17928, ML17959, ML17939, ML17929, ML993, SB67108, SB67138, SB67148, SL82418, SL82318, SL82118, SL80108, SB67158, 1070, etc. Panasonic: KX-TGF575S, KX-TGF352N, KX-TGA470, KX-TGA652, KX-TGA660, KX-TGA931T, KX-TGA950B, KX-TGE430B, KX-TGE432, KX-TGE433B, KX-TGEA20, KX-TGEA40, KX-TG6592T, etc. | SUPERB SOUND & COMFORTABLE: 2.5mm Lightweight office phone headset with enhanced voice clarity technology reduces unwanted background noise and delivers clear sound for both ends. Soft and high quality ear cushions ensure comfortable wearing even for long phone conference calls. | EASY TO USE: Just directly plug the headset into your 2.5mm headset port on your phone, no additional amplifiers or adapters required. Comes with in-line volume control, this AT&T phone headset is easily adjusted the volume and muted the microphone when needed. | GREAT DURABILITY & WARANTTY: The High-end materials and durable construction ensure this Panasonic landline phone headset to withstand the constant demands of all-day use in busy environments. Guarantees your satisfaction with 45 days free replacement or full refund and 2 years warranty.