RJ9 (RJ22) Call center headset for Avaya (96xx series only), Grandstream, Snom, Zultys Phones Noise Cancelling Headset for Call Center. Wear the headset on your head, Hand Free, No more cradle the handset at your neck. Comfortable for All-Days. Compatible with: Avaya 1608, 1616, 9601, 9608, 9608G, 9611G , 9621G, 9641G, 9650 IP Deskphone Grandstream GXP IP phones (not include GXP1400 and GXP1405), Zultys IP Phone models: ZIP 37G, ZIP 36G ZIP 35i, ZIP 33i. Rotatable, Manageable Long-lasting metal microphone boom, Adjustable head-band Clear sound, durable, 5ft cord, Lightweight, Over-the-Head style, Soft Leatherette Ear Cushion. Rotatable, Flexible Long-lasting metal microphone boom, Adjustable head-band. 2 Years Manufacture Warranty Included!