IF YOUR PHONE IS NOT ON THE BELOW LIST, PLEASE CONTACT US TO CHECK THE COMPATIBILITY. ,It's also compatible with Mitel,Aastra,Shortel,Toshiba,NEC, Allworks,3Com Gigaset,Zultys Comdial,Toshiba DKT,ESI,Fotinet,Digium and most IP phones. * Compatible with POLY P series. Nortel 1120E IP 1140E IP 1150E IP i2002 (ip2002) i2004 Shortel IP100 IP212 212K IP230 IP265 IP530 IP560 560G IP565 IP565G IP655 420 480G 485. Avaya/Lucent 6420D 6408D+ 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. [COMPATIBILITY] U10P bottom adapter with RJ09 is compatible with POLYCOM VVX50 VVX101 VVX150 VVX201 VVX250 VVX300 VVX350 VVX301 VVX310 VVX311 VVX400 VVX401 VVX410 VVX411 VVX450 VVX500 VVX501 VVX600 & VVX601, IP301 IP335 IP331 IP335 IP560 IP550 CX300 CX500 CX600 CX700. [Features] 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 and strong connection between headband and speaker body. Luxury metal cap not to insert any hair when adjusting the headband. [All day Comfort] Very comfort, endurable and smart designed for office, contact center and home workers. Premium protein leatherette cushions is included. [WARRANTY] 3 years after purchased date. [ASP Circuit] Acoustic shock protection circuit on the speaker protect you from unwanted peak noises on desk phones. Cut over 105dB and keep less 105dB level. [Ready to Use] Quick Disconnect (QD) to RJ9 with IPD Headset allow easy connection to desk phones. Plug and play. [WIDEBAND AUDIO & NOISE CANCELLING MICROPHONE] IPD IPH-255 Double Ear wired phone headset has a HD Wideband speaker to be clear sound and passive noise cancelling microphone make clearer conversation by reducing background noise.