OvisLink Call Center Headset Compatible with Zultys IP Phones Corded Noise Canceling Call Center headset, Acoustic Shock Protection Comes with RJ9 Quick Disconnect cord, direct connect to Zutyls IP phone's headset jack. No need additional Adapter. Compatible with Zultys IP Phone models: ZIP 37G, ZIP 36G ZIP 35i, ZIP 33i (not included ZIP 59i, ZIP 55i, ZIP 53i) Rotatable, flexible microphone boom, Click-Stop adjustable headband and boom Superior sound when works with compatible phone models. Comfort for All-days. 2 Years Manufacture Warranty Included!