4-pin RJ9(4P4C) Plug, NOT RJ11 plug Headset Headphone Call Center Desk Telephone Monaural Mic Mircrophone *Suitable for all telephone.

• 1.Provides all day comfort, clarity and durability for Desk Telephone.
• 2.Offers the added value of a noise cancelling microphone which will eliminate up to 90% of the background noise making it ideal for use at home or in the office.
• 3.4-pin RJ9(4P4C) Plug, NOT RJ11 plug, directly connect over the head headset headphone, no additional amplifiers or adapters required.
• 4.Adjustable headband and Suitable for all telephone.except suit for Nortel phone.
• 5.Color:Silver

1.Provides all day comfort, clarity and durability for Desk Telephone.Caroo