VoIP NEC I-SIP Multi-Line Telephone for SL2100- Supports Ethernet Gigabit Speed Full Duplex- 8 Programmable Keys Visible at a Time May Scroll Up to 32- Programmable Button Labels- Powered via POE- Full Duplex Speakerphone- Elegantly designed and feature-packed- Customizable to meet employeesFT specific communications needs- Supports a wide-range of applications which can help improve overall employee efficiency and productivity- Delivers maximum deployment flexibility and investment protection- Easy to use intuitive interface and an interactive user manual