CQtransceiver RJ9 Wired Calling Center Telephone Headset for AVAYA Lucent Landline Phones 2410 2420 4610 4620 Direct connect over the head headset, no additional amplifiers or adapters required 2M coiled wire Flexible boom design allows to adjust mic freely RJ9 connector to replace telephone handset Monaural over-the-head wearing style for comfort and awareness of environment