Call Center Headset for AASTRA, Allworx, Altigen, Avaya, NEC, Nortel meridian, Norstar, PolyCom, ShoreTel, Samsung and Talkswitch Telephones with RJ9 headset jack Premium Voice Quality Noise Cancelling Headset with Lightweight Over-the-Head style. Hand Free Headset, no more cradle the phone at your neck! Smooth leatherette ear cushion, Adjustable headband, Manageable Microphone Stem and Rotatable MIC boom. Comfort for All-days! Compatible with Avaya Models: 1120, 1140, 1165, 1210, 1220, 1230, 1408, 1416, 3904, 3905, 7208, 7316, 9404, 9408, 9504, 9508 IP Deskphone Compatible with Polycom Models: SoundPoint IP 335, 450, 550, 650, 670, Microsoft Lync CX200, CX600 Media Business Phone VVX101, VVX201, VVX300/301/310/311, VVX400/410, VVX500, VVX 600 Compatible with All Mitel, AASTRA, NEC, Nortel, Norstar, ShoreTel, FortiFone, phones that have RJ9, RJ11 headset jack Complete set, no need additional purchase. Durable, 2 Years Manufacture Warranty Included!