Voistek Call Center Telephone Headset Headphone for Avaya Lucent AT&T 1408 1416 2410 2420 2430 4424LD+ 4424D+ 4412D+ 4406D+ 4606 4610 4612 4620 4621 4622 4624 4625 4630 5410 5420 5610 5620 5621 6416D+M 6424D+M 9404 9406 9408 9504 9508 Direct connect over the head 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, 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. 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, NO Mute / Volume Control built in. WORKS for Avaya Lucent AT&T 1408 1416 2410 2420 2430 4424LD+ 4424D+ 4412D+ 4406D+ 4606 4610 4612 4620 4621 4622 4624 4625 4630 5410 5420 5610 5620 5621 6416D+M 6424D+M 9404 9406 9408 9504 9508