【Compatible with Plantronics QD Headsets】: This headset cable is compatible with All Plantronics Quick Disconnect (QD) headsets and other headsets with the same QD connector. Great headset cable replacement of Plantronics 2.5mm Adapter. NOT for Jabra GN Headsets. | 【2.5mm Jack Phone Compatibility】: This 2.5mm headset adapter is ONLY Compatible with AT&T ML17929 VTech Panasonic Dect 6.0 Uniden RCA Cisco Linksys SPA Grandstream Zultys Gigaset Polycom Office landline and cordless phones with standard 2.5mm headset jack. NOTE: NOT COMPATIBLE with 3.5mm headphone jacks in Cell Phones and Computers. | 【Super Long & Ultra Durable】: The length is 68 inches/5.7 feet before stretching, 80 inches/6.7 feet after stretching. This QD to 2.5mm cable provides the rational length for connecting a QD headset to a telephone and facilitates talking anytime. Coiled cable with spring wire design, free from knotting or twining, durable and strong. | 【Easy to Connect】: Plug and play, simple to use. It only takes 2 steps to use: Plug the 2.5mm Jack to the headset port of your phone; Connect QD Adapter to your headset port. QD feature enables you to walk away from the desk without taking headset off and keeping call still remains. It's a practical and good companion for business, make your work easier. | 【1-Year Warranty & Compatibility Notes】: We offer 45 days money back & 1 year worry-free guarantee. ONLY COMPATIBLE with some specific phone models with standard 2.5MM Headset Jack listed in description (include but not limited). DO NOT buy it for smartphones and laptops. For other phones, please consult us for Compatibility Guide or Advice.