**********Premium Binarual headset with Noise Cancellation microphone and Acoustic shock protection circuit. Very comfort, endurable and smart designed for professional office and contact centers users. *****3 Year warranty. Slim and flexible microphone boom arm with 120 degree bended for the best position to the mouth. Ergonomic curved headbands for comfort wearing with smooth click stop for adjustment for both ears and strong connection between headband and speaker body. Luxury metal cap not to insert any hair when adjusting the headband. ******U10P bundle cable works with Polycom CX300 CX500 CX600 CX700 VVX50 VVX101 VVX150 VVX201 VVX250 VVX300 VVX350 VVX301 VVX310 VVX311 VVX400 VVX401 VVX410 VVX411 VVX450*****Avaya/Lucent 6420D6408D+ 6424D+M 8403 8410D 8434DX 4406D+ 4412D+ 4424D+ 4424LD+ 4610 4610SW 4612 4620 4620SW 4621 4621SW 4622 4622SW 4625 4625SW 4630 4630SW 5410 5420 5610 5621 5625 7208 7316 9404 9406 9408 9504 9508 DT1 DT3 DT5 QE 4616 Nortel 1120E IP 1140E IP 1150E IP i2002 (ip