Voistek Monaural Call Center Telephone Headset Headphone with Flexible Noise Cancelling Microphone for Nortel Norstar Northern Telecom Meridian NEC Toshiba Inter-Tel Shoretel Aastra Packet8 Mitel 3Com ESI Talkswitch and Iwatsu 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. Direct connect over the head RJ headset,no additional amplifiers or adapters required, most easy setup HANDS FREE 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, Shirt clips included, NO Mute / Volume Control built in.