You plug this modular plug into the headset jack on your phone Features quick disconnect cord, superior sound quality and extremely comfortable fit design for all-day use. Only compatible with telephones with a built-in amplifier. Some specific models: Electra Elite DTerm, Series E, Models DTU-8, DTU-8D, DTU-16, DTU-16D, DTU-32, DTU-32D, DPT-8, DPT-8D, DPT-16, DPT-16D, DPT-32, DPT-32D SoundPoint IP Phone Series, Models 300, 335, 500 (rev. 5 or later), 600 Not responsible for incompatibility issues. Ships within 1-2 days of payment. Quick Disconnect feature allows you to walk away from the phone while still wearing your headset *For any question about the item, please feel free to contact me. Buyer is responsible for paying any governmental taxes imposed on your purchases, including, but no.
