Voistek Corded Mono Monaural Call Center Telephone RJ Headset Noise Cancelling Headphone with Mic and Quick Disconnect for Avaya Nortel Polycom Nec GE Office Landline IP Phones Deskphone (H10PA10) Direct connect over the head RJ telephone headset,no additional amplifiers or adapters required, most easy setup headset solution for Most Standard Telephones Equipped with Modular RJ Headset Port. Superior Call Center quality headset FOR DESK PHONE, excellent sound quality, lightweight, durable and comfortable for all day use Noise canceling microphone to reduce background noise and Acoustic Shock Protection circuit to protect your hearing. A LANDLINE TELEPHONE HEADSET WITH Flexible goose neck boom,adjustable headband,Extra comfortable leatherette ear pad,hearing on one side and microphone can be worn on either ear. Shirt clips included, Mute / Volume Control built in. See Compatible Phone List (PARTIAL) in Description, DO NOT BUY IF YOU CAN NOT FIND YOUR PHONE MODEL IN LIST, CONTACT US FOR COMPATIBILITY GUIDE ON YOUR SPECIFIC TELEPHONE MODEL IF NEEDED.