NEC Compatible Plantronics Cordless Headset Bundle | For NEC Univerge IP phones: DT330, DT430, DT730, DT750, DT830, DT850 | Includes Remote Answering Kit | Bundle of 2 items - Plantronics Wireless Headset & Electronic Remote Answerer Range up to 350 feet away for maximum mobility Compatible NEC Univerge IP phones: DT330, DT430, DT730, DT750, DT830, DT850 Wearing Styles: Headband & Earhook Kit included Electronic Remote Answerer - remotely answer/end calls (included). The remote answering feature will only work with the list of compatible phones in the description.